1. IOR/L/MIL/17/12/22 Reference (shelfmark): IOR/L/MIL/17/12/22 Title: Scheme for the defence of the port of Karachi, revised to 1st April 1933. Calcutta: GSI, 1933. Scope & Content: Maps; Secret Collection Area: India Office Records and Private Papers Languages: English Date Range: 1933 Extent: xii, 101p, 33cm