Washington, D. C. United States Government Printing Office, 1979. stapled binding, 55 pages, illustrated. Prepared in cooperation with the Arab Republic of Egypt under the auspices of the United States Agency for International Development. DT3. More
Washington, D.C. United States Government Printing Office, 1972. stapled binding, 39 pages, Contributions to the Hydrology of Africa and the Mediterranean Region DT3. More
United States Government Printing Office, 1991. 13th printing. softcover, 10.25" x 7.75", 13 pages, Plate 1 inside rear pocket. from the foreword, "Man cannot survive on this planet without utilizing its natural resources prudently. Every human action affects the world around us in some degree and the full effect is..... More