1. Geographic map of the Northern Tuwayq quadrangle, Kingdom of Saudi Arabia [cartographic material] Yale Public content 1957. 2012-08-23T20:07:25Z. 2015-03-17T22:02:52Z. Bramkamp, Richard A. The Survey. English&Arabic. Public. Saudi Arabia.
2. Physical map of Great Britain Yale Public content 1957. 2002-06-01T04:00:00Z. 2016-11-29T22:08:56Z. Great Britain. Ordnance Survey. Director General of the Ordnance Survey. English. Public. Great Britain.