Whitaker, Ewen A. (Ewen Adair) ; Kuiper, Gerard P. (Gerard Peter), 1905-1973 ; Hartmann, William K ; Spradley, L. Harold, 1938 ; University of Arizona. Lunar and Planetary Laboratory
Aeronautical Chart and Information Center, United States Air Force 1963
Whitaker, Ewen A. (Ewen Adair) ; Kuiper, Gerard P. (Gerard Peter), 1905-1973 ; Hartmann, William K ; Spradley, L. Harold, 1938 ; University of Arizona. Lunar and Planetary Laboratory
Aeronautical Chart and Information Center, United States Air Force 1963
Whitaker, Ewen A. (Ewen Adair) ; Kuiper, Gerard P. (Gerard Peter), 1905-1973 ; Hartmann, William K ; Spradley, L. Harold, 1938 ; University of Arizona. Lunar and Planetary Laboratory
Aeronautical Chart and Information Center, United States Air Force 1963