TY  - RPRT
TI  - Operator's manual for a four-film computer-based, sonic digitizing table to locate earthquakes
AU  - Mary C. Astrue
AU  - J.R. Pelton
AU  - W.H. Lee
AU  - R.A. Page
PY  - 1983
DO  - 10.3133/ofr83319
UR  - https://pubs.usgs.gov/publication/ofr83319
ID  - ofr83319
ER  -