References

International Livestock Centre for Africa (ILCA). 1981. Low-level Aerial Survey Techniques. ILCA Monograph 4. International Livestock Centre for Africa, Addis Ababa, Ethiopia.

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.