TY  - RPRT
TI  - HYPOELLIPSE; a computer program for determining local earthquake hypocentral parameters, magnitude, and first-motion pattern
AU  - John C. Lahr
PY  - 1999
DO  - 10.3133/ofr9923
UR  - https://pubs.usgs.gov/publication/ofr9923
ID  - ofr9923
ER  -