TY - RPRT TI - Peak horizontal acceleration and velocity from strong motion records including records from the 1979 Imperial Valley, California, earthquake AU - William B. Joyner AU - David M. Boore AU - Ronald L. Porcella PY - 1981 DO - 10.3133/ofr81365 UR - https://pubs.usgs.gov/publication/ofr81365 ID - ofr81365 ER -