MGDS References
Bensen, G.D., M.H. Ritzwoller, and Y. Yang, "A 3-D shear velocity model of the crust and uppermost mantle beneath the United States from ambient seismic noise", Geophys. J. Int., 177: 1177-1196, 2009, DOI 10.1111/j.1365-246X.2009.04125.x. (View Reference)
