TY  - RPRT
TI  - Earthquakes in the United States, April-June 1981
AU  - Carl W. Stover
AU  - J. H. Minsch
AU  - P. K. Dunbar
AU  - B.G. Reagor
PY  - 1982
DO  - 10.3133/cir871b
UR  - https://pubs.usgs.gov/publication/cir871B
ID  - cir871B
ER  -