TY  - RPRT
TI  - A review of recent activity in the United States.
AU  - H.L. Cannon
AU  - W.L. Petrie
PY  - 1979
DO  - 10.1098/rstb.1979.0096
UR  - https://pubs.usgs.gov/publication/70012292
ID  - 70012292
ER  -