Trees in the Koran and the Bible, L. J. Musselman, Unasylva: an international journal of forestry and forest industries, #213: Perceptions of forests (54, #2, 2003).
saudiaramcoworld.com
The Waters That Heal, Kirk Albrecht and Bill Lyons, Saudi Aramco World, March/April 1995, pp. 34–39.
