1. IOR/R/20/G/154 Reference (shelfmark): IOR/R/20/G/154 Title: Underground water resources reports Donald Gear, Aden, Mar-Jul 1961 typ No 1 The underground water resources of the Wadi Hadhramaut, 31 Mar 1961 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1961 Extent: 1 volume