1. Map of Eldorado County / compiled, published, and copyrighted by Progressive Map Service. Creator: Progressive Map Service Published / Created: [191-?] Call Number: 844 El24 1915 Container / Volume: BRBL_00604 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Map of Eldorado County / compiled, published, and copyrighted by Progressive Map Service.
2. Map of the San Joaquin Valley, California / compiled and published by the Progressive Map Service. Creator: Progressive Map Service Published / Created: [191-?] Call Number: 844 Sa524 1915 Container / Volume: BRBL_00610 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Map of the San Joaquin Valley, California / compiled and published by the Progressive Map Service.
3. Highway map of Washington & Oregon / maps prepared by Progressive Map Service, Fresno, California Creator: Progressive Map Service Published / Created: c1924. Call Number: 847gmb 1924A Container / Volume: BRBL_00629 Image Count: 2 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Highway map of Washington & Oregon / maps prepared by Progressive Map Service, Fresno, California ; compliments of Standard Oil Company, California.