1. IOR/X/9007/79 Reference (shelfmark): IOR/X/9007/79 Title: Sheet 79 Calcutta Second (Revised) Edition (considerable changes) 1927. Scope & Content: Registered 1922. Previous edition 1917 (helio). Layered. Inset: Calcutta and Environs, 1 Inch to 4 Miles, or 1:253,440. Collection Area: Map Collections Languages: English Date Range: 1927 Extent: 1 item