TY  - RPRT
TI  - Seismic velocities from borehole measurements at four locations along a fifty-kilometer section of the San Andreas fault near Parkfield, California
AU  - J. F. Gibbs
AU  - E. F. Roth
AU  - T. E. Fumal
AU  - N.A. Jasek
AU  - M.A. Emslie
PY  - 1990
DO  - 10.3133/ofr90248
UR  - https://pubs.usgs.gov/publication/ofr90248
ID  - ofr90248
ER  -