TY  - RPRT
TI  - A digital version of the 1970 U.S. Geological Survey topographic map of the San Francisco Bay region, three sheets, 1:125,000
AU  - Douglas S. Aitken
PY  - 1997
DO  - 10.3133/ofr97500
UR  - https://pubs.usgs.gov/publication/ofr97500
ID  - ofr97500
ER  -