Wilburn, D.R., Di Francesco, C., and Bleiwas, D.I., 1996, Estimated use of explosives in the mining industries of Egypt, Jordan, Syria, Tunisia, and Turkey: Lawrence Livermore National Laboratory Report UCRL-CR-125620, variously paged.

Williams-Stroud, S.C., Searls, J.P., and Hite, R.J., 1994, Potash resources, in Carr, D.D., ed., Industrial minerals and rocks: Littleton, Colo., Society for Mining, Metallurgy and Exploration, p. 783-802.