Military Intelligence, FM 30-30 Aircraft Recognition Pictorial Manual 1943-04-01 (OBSOLETE)
"The present manual on aircraft recognition is primarily designed for self-instruction and general use but will also serve as a text in recognition courses. It includes four types of material: black and white silhouettes; wash drawings; photographs; and editorial matter. The material in this manual has been assembled and edited jointly by Army and Navy aviation training divisions."
Digitized by the Combined Arms Research Library (CARL) Digital Library, US Army Combined Arms Center. http://cgsc.cdmhost.com/cdm/
War Department, FM 30-30; Navy Department, BUAER 3