1. IOR/R/20/G/158 Reference (shelfmark): IOR/R/20/G/158 Title: Underground water resources reports Donald Gear, Aden, Mar-Jul 1961 typ No 5 ... part of the Abyan delta catchment area, 15 Jun 1961 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1961 Extent: 1 volume