@article{topographic:59124, recid = {59124}, title = {Historic topographic maps of California: San Francisco Bay Region. HISTOPO}, publisher = {U.S. Geological Survey National Mapping Division}, address = {Reston. 2001}, pages = {13 computer laser optical disc}, year = {2001}, note = {Map edition dates range from 1897 to 1997.}, url = {http://digicoll.lib.berkeley.edu/record/59124}, }