1. IOR/L/MIL/17/12/32 Reference (shelfmark): IOR/L/MIL/17/12/32 Title: Madras port defence scheme, revised to 1st August 1939. Simla: GSI, 1939. Scope & Content: Map; Secret typescript inserts; Collection Area: India Office Records and Private Papers Languages: English Date Range: 1939 Extent: xxix, 98p, 33cm