Aerial photography - USA Voorschrift, Technical Manual, 1-220 Elementry map and aerial photography reading - USA Voorschrift, Field Manual Advanced map and aerial photograph reading - USA Voorschrift, Field Manual, 21-26 Advanced map and aerial photograph reading - USA Basic Field Manual, FM 21-26 Elementary map and aerial photograph reading - USA Voorschrift, Basic Field Manual, 21-25 Aerials 100-Ft. no. 5. (Used with Wireless Sets Nos. 19, 22, 62 and 76). WO 1576 - Engeland Voorschrift
