1. Philadelphia / [cartographic material] / O.W. Gray & Son. Creator: O.W. Gray & Son Published / Created: c1876. Call Number: 774 P53 1876A Container / Volume: BRBL_00500 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Philadelphia / [cartographic material] / O.W. Gray & Son.