1. IOR/L/E/7/1231, File 1643 Reference (shelfmark): IOR/L/E/7/1231, File 1643 Title: File 1643 Opium arrangements in China and Japan: destruction of poppy crops by Chinese on Burma-Yunnan frontier Collection Area: India Office Records and Private Papers Languages: English Date Range: 14 Jul 1920-30 Jul 1925 Extent: 1 file