TY  - RPRT
TI  - Frequency of earthquakes for selected areas in the western United States for the period 1945-59
AU  - W.S. Twenhofel
AU  - R.A. Black
AU  - D.F. Balsinger
PY  - 1962
DO  - 10.3133/ofr62137
UR  - https://pubs.usgs.gov/publication/ofr62137
ID  - ofr62137
ER  -