1. IOR/L/PS/20/MEMO30/4 Reference (shelfmark): IOR/L/PS/20/MEMO30/4 Title: The trade and resources of the Province of Yunnan in western China .... J Coggin Brown, Assistant Superintendent, Geological Survey of India, 14 Feb 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: 14 Feb 1911 Extent: 45pp