1. IOR/L/PS/11/170, P 2288/1920 Reference (shelfmark): IOR/L/PS/11/170, P 2288/1920 Title: P 2288/1920 Regarding unit of measurement used in the survey of Mesopotamian Railways Collection Area: India Office Records and Private Papers Languages: English Date Range: 27 Jan 1920-10 Apr 1920 Extent: 1 file