11. IOR/X/9002/11 Reference (shelfmark): IOR/X/9002/11 Title: Conventional Signs for Topographical Maps of the Survey of India. Scope & Content: January 1939. Large format, including column 'For reduction by one-third'. Registered 1933. Heliozincographed. Collection Area: Map Collections Languages: English Date Range: Unspecified Extent: 1 item