|The Improvement of Tropical and Subtropical Rangelands (BOSTID)|
|Regional resource assessment|
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McLeod, R. G. and H. B. Johnson. 1981. Resource inventory techniques used in the California desert conservation area. In Arid Lands Resource Inventories: Developing Cost - Efficient Methods. General Technical Report W0-28:260-271. U.S. Department of Agriculture, Forest Service, Washington, D.C., USA.
Michell, C. W. and J. A. Howard. 1979. Land System Classification. A Case History: Jordan. Food and Agriculture Organization of the United Nations, Rome, Italy.
Townshend, J. R. G., ed. 1981. Terrain Analysis and Remote Sensing. George Allen and Unwin, London, England.