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.
Folder: S.F. Islands-Treasure-1951. On back: "Treasure Island, Calif. March 22--Formal ceremonies held here this week marked the official activation of the Armed Services Police Detachment serving the San Francisco-East bay areas. Only other city now patrolled by such joint Armed Services police is Washington, D. C. usn-usn".