1. IOR/R/20/B/552 Reference (shelfmark): IOR/R/20/B/552 Title: File 51/1 Mines and Minerals: enquiry from Mr J Hughes concerning the mineral resources of the island of Socotra Collection Area: India Office Records and Private Papers Languages: English Date Range: 30 Mar 1937-20 Apr 1937 Extent: 1 file