TY  - RPRT
TI  - HYPO71 (revised; a computer program for determining hypocenter, magnitude, and first motion pattern of local earthquakes
AU  - William Hung Lee
AU  - John C. Lahr
PY  - 1975
DO  - 10.3133/ofr75311
UR  - https://pubs.usgs.gov/publication/ofr75311
ID  - ofr75311
ER  -