Photo-interpretation studies of desert basins in Northern Africa
by H.T.U. Smith ; prepared for Air Force Cambridge Research Laboratories
U.S. Dept. of Commerce, National Technical Information Service, [1969]
"Contract no. AF 19(628) 2486, project no. 8623, task no. 862302, work unit no. 86230201, final report (part I) March 1963-July 1968."
"References": leaves 54-60