1. IOR/L/PS/11/138, P 3554/1918 Reference (shelfmark): IOR/L/PS/11/138, P 3554/1918 Title: P 3554/1918 Tibet: coal at Nagchuka Collection Area: India Office Records and Private Papers Languages: English Date Range: 6 Apr 1916-8 Sep 1919 Extent: 1 file