1. 'File 61/11 VIII (D 148) Nejd-Hejaz: Miscellaneous' Date: 1936/1939 Language: English Geographic region: YemenHejazPalestine
2. Coll 6/11 'Hejaz-Nejd Affairs: Economic Development in the Hejaz' Creator: Author: Karl Saben Twitchell Date: 1929/1937 Language: English Geographic region: Kingdom of Nejd and HejazSaudi Arabia