TY  - RPRT
TI  - Instrumentation studies of earth tremors related to geology and to mining at the Somerset coal mine, Colorado
AU  - Frank W. Osterwald
AU  - C.R. Dunrud
AU  - J.B. Bennetti
AU  - J. O. Maberry
PY  - 1972
DO  - 10.3133/pp762
UR  - https://pubs.usgs.gov/publication/pp762
ID  - pp762
ER  -