TY - RPRT TI - Microearthquake spectra from the Anza, California, seismic network: Site response and source scaling AU - Arthur D. Frankel AU - Leif Wennerberg PY - 1989 DO - 10.1785/bssa0790030581 UR - https://pubs.usgs.gov/publication/70015749 ID - 70015749 ER -