TY - RPRT TI - Interim report on seismic velocities of the Oak Spring formation, U12e and U12b tunnel systems, Nevada Test Site, Nye County, Nevada AU - R. M. Hazlewood PY - 1961 DO - 10.3133/ofr6160 UR - https://pubs.usgs.gov/publication/ofr6160 ID - ofr6160 ER -