TY - RPRT TI - Near-Surface Shear Wave Velocity Versus Depth Profiles, VS30, and NEHRP Classifications for 27 Sites in Puerto Rico AU - Jack K. Odum AU - Robert A. Williams AU - William J. Stephenson AU - David M. Worley AU - Christa von Hillebrandt-Andrade AU - Eugenio Asencio AU - Harold Irizarry AU - Antonio Cameron PY - 2007 DO - 10.3133/ofr20071174 UR - https://pubs.usgs.gov/publication/ofr20071174 ID - ofr20071174 ER -