1. IOR/W/L/PS/21/N4/31N Reference (shelfmark): IOR/W/L/PS/21/N4/31N Title: Sheet 31N [DIZ First Edition] 1915. Scope & Content: Registered 1914. Reg.No.162 D.D.D.1914–S.I. 500.Three copies. Collection Area: Map Collections Languages: English Date Range: 1915 Extent: Three copies