1. IOR/L/E/9/747 Reference (shelfmark): IOR/L/E/9/747 Title: Collection 117/6 Opium and Drugs: Reports and statistics - Permanent Central Opium Board: discrepancies in statistics supplied by Government of India and explanations Collection Area: India Office Records and Private Papers Languages: English Date Range: Mar 1931-Dec 1947 Extent: 1 file