TY  - RPRT
TI  - California earthquakes: Why only shallow focus?
AU  - W.F. Brace
AU  - J.D. Byerlee
PY  - 1970
DO  - 10.1126/science.168.3939.1573
UR  - https://pubs.usgs.gov/publication/70010284
ID  - 70010284
ER  -