Split reference 1-26 are found in Silver's Compilation paper.  I'd like
to thank Paul Silver for sending an electronic version of his tables
along to me.:
----------------------Silver's Compilation--------------------------------
1-26:  Silver, PG,  Seismic Anisotropy Beneath the Continents: Probing the
Depths of Geology,  Annu. Rev. Earth Planet Sci., 24, 385-432, 1996.

1: Bormann P, Burghardt P-T, Makeyeva LI, Vinnik LP, Teleseismic shear-wave
splitting and deformations in central Europe,  Phys. Earth Planet. Inter., 78,
157-166, 1993.

2: Helffrich G, Silver PG, Given H., Shear wave splitting variations over short
spatial scales on continents, Geophys. J. Int. 119, 561-573, 1994.

3: Helffrich G, Lithospheric deforation inferred from teleseismic shear wave
splitting ovservations in the UK, J. Geophys. Res. 100, 18,195-18,204, 1995.

4: Silver PG, and Chan WW, Shear-wave splitting and subcontinental mantle
deformation, Geophys. Res. Lett., 20, 1127-1130, 1991.

5: Vinnik LP, Makeyeva LI, Milev A, Usenko Y, Global Patterns of
azimuth anisotropy and deformation in the continental mantle, Geophys. J.
Int., 111, 433-447, 1992.

6: Vinnik LP, Krishna VG, Kind R, Bormann P, Stammler K, Shear wave splitting
in the records of the German Regional Seismic Network, Geophys. Res. Lett. 21,
457-460.

7: Fouch MG, Fischer KM, Mantle anisotropy beneath northwest Pacific
subduction zones, J. Geophys. Res, 101, 15987-16002, 1996.

8: Gao S, Davis PM, Liu H, Slack PD, Zorin YA, et al, Seismic anisotropy and
mantle flow beneath the Baikal rift zone, Nature, 371, 149-151, 1994.

9: Barruol G, Souriau A, Anisotropy beneath the Pyrenees Range from
teleseismic shear wave splitting: results from a test experiment, Geophys.
Res. Lett., 22, 493-496, 1995.

10: McNamara DE, Owens TJ, Silver PG, Wu FT, Shear wave anisotropy beneathe
the Tibetan Plateau, J. Geophys. Res., 99, 13,655-13,665, 1994.

11: Makeyeva LI, Vinnik LP, Roecker SW, Shear-wave splitting and small-scale
convection in the continental upper mantle, Nature, 358, 144-147, 1992.

12: Bostock MG, Cassidy, J, Variations in shear wave splitting across the
canadian National Seismic Network, Geophys. Res. Lett, 22, 5-8, 1995.

13:  Barruol G, Silver PG, Vauchez A. 1997, Shear wave splitting in the
eastern U.S: deep structure of a complex continental plate, J. Geophys Res.,
102, 8329-?.

14:  Sandvol, E., Ni, J., Mapping seismic azimuthal anisotropy in the 
United States from LRSM short period data, Eos, Transactions, AGU, 75 p481, 1994.
(Digitized analog data)

15:  Silver PG, Kaneshima S, Constraints on mantle anisotropy beneath Precambrian
North America from a transportable teleseimic experiment, Geophys. Res. Lett, 20
1127-1130, 1993.

16: Ruppert S, Tectonics of western North America: a teleseismic view, PhD 
Thesis, Stanford Univ., 216 pp., 1992.

17: Ozalaybey S, and Savage MK, Shear-wave splitting beneath western United States
in relation ot plate tectonics, J. Geophys. Res., 100, 18,135-18,149, 1995.

18: Ozalaybey and Savage, 1995 (above); Savage and Silver, 1993 (below).

19: Savage MK, and Silver PG, Mantle deformation and tectonics: constraints from
seismic anisotropy in western United States, Phys. Earth Planet. Int., 78, 208, 
1993.

20: Sandvol, Ni J, Ozalaybey S, Schue J, Shea-wave splitting in the Rio Grande
Rift, Geophys. Res. Lett., 19, 2337-2340, 1992.

21: James DE, Assumpcao M, Tectonic implications of S-wave anisotropy beneath
SE Brazil, Geophys. J. Int., 126, 1-10, 1996.

22: Russo R, Silver PG, Cordillera orogenesis, mantle dynamics, and the
Wilson Cycle, Geology, 24, 511-514, 1996.

23: Kaneshima S, and Silver PG, Anisotropic Loci in the Mantle beneath central Peru,
Phys. Earth Planet. Int., 88, 257-272, 1995.

24: Kaneshima and Silver, 1995 (above); Helffrich et al, 1994 (above).

25: Russo RM, Silver PG, Franke M, Ambeh WB, James DE, 1996, Shear-wave splitting in
northeast venezuela, Trinidad and the Eastern Caribbean, Phys. Earth Planet. Int.,
95, 251-275, 1996.

26: Vinnik LP, Green RWE, Nicolaysen LO, Recent Deformations of the deep
continental roots in southern Africa, Nature, 375, 50-52, 1995.
-----------------------End of Silver's Compilation------------------------------

27: Savage MK, Sheehan AF, Lerner-Lam A, Shear wave splitting across the Rocky 
Mountain Front, Geophys. Res. Lett., 23, 2267-2270, 1996.

28: Schutt DL, Humphreys Eugene D, Dueker K, Anisotropy of the Yellowstone 
Hot Spot wake, eastern Snake River Plain, Idaho, PAGEOPH, 1998.
Note: These are station averages.

29: Fouch, M.J., K.M. Fischer, and E.M. Parmentier, Shear Wave
Splitting, Continental Keels, and Patterns of Mantle Flow,
in prep., J. Geophys. Res.  Note:  station HRV is the Wolfe & Silver [1998]
stacked method as taken from Barroul, Silver, and Vauchez,
1996.  All values are station averages.

30: Ellis (Still trying to track this one down)

31: Margheriti, L., Nostro, C., Cocco, M., Amato, A, Seismic anisotropy beneath the
northerb Apennines, Geo. Res. Lett., v23/20 2721-2724, 1996.

33: Margheriti L., Pondrelli S., Seismic anisotropy in the Mediterranean area, 
submitted to Geo. Res. Lett, 1998.

32: Pondrelli S.,  Azzara R., Upper mantle anisotropy in Victoria Land
(Antarctica), Pageoph , 151, 433-442, 1998.

33: Wolfe, C J, and Solomon, S. C., "Shear-wave splitting and Implications for Mantle
Flow Beneath the MELT region of the East Pacific Rise", Science, 280,
1230-1232, 1998.  These are station averages

34: Sheehan, A. F., Jones, C. H., Savage, M. K. Ozalaybey, S., and Schneider, J. M,
Contrasting lithospheric structure between the Colorado Plateau and Great Basin: Initial
results from Colorado Plateau - Great Basin PASSCAL experiment, Geo. Res. Lett., 24,
2609-2612, 1997.