1. Strategic map [of the United States]. Twin Cities sheet. Creator: United States. Army. Corps of Engineers Published / Created: 1940 Call Number: 814 M666 1940 Container / Volume: BRBL_00558 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Strategic map [of the United States]. Twin Cities sheet.