TY - RPRT TI - Preliminary report on the geologic events associated with the May 31, 1970, Peru earthquake AU - George Edward Ericksen AU - George Plafker AU - Jaime. Fernandez Concha PY - 1970 DO - 10.3133/cir639 UR - https://pubs.usgs.gov/publication/cir639 ID - cir639 ER -