1. IOR/W/L/PS/21/N4/28D Reference (shelfmark): IOR/W/L/PS/21/N4/28D Title: Sheet 28D [CHEHCHEH Preliminary Edition] 1915. Scope & Content: Reg.No.180 D.D.D.1914–S.I. 500.Four copies. Collection Area: Map Collections Languages: English Date Range: 1915 Extent: Four copies