In upper margin: Algeria 1:10,000 ... "Projection approximate." "Prepared under the direction of the chief of engineers, U. S. Army, 1943. Compiled from aerial photographs, 1:12,000, G. S. G. S. no. 4275, Sidi Bel Abbès, 1942." https://catalog.lib.utexas.edu/record=b3367758x~S29 -sierra link