Though not required of public domain images, if you want to credit the library as the source, please use the following statement: "From the San Francisco History Center, San Francisco Public Library" and provide a link back to the item on our Digital Collections site.
San Francisco Department of Public Works Proposed San Francisco-Oakland Bay Bridges Records (SFH 87). Box 2; folder 20 Photo appears in Appendix No.1, San Francisco Terminal inside "Report to the Board of Supervisors, City and County of San Francisco for a Transbay Bridge - Rincon Hill to Oakland Mole, submitted by Construction Company of North America, August 24, 1926."