field survey pamphlet Lithographic processes / prep. under the dir. of the Chief of the Imperial General Staff ; [issued by the War Office] Advanced map and aerial photograph reading - USA Basic Field Manual, FM 21-26 Enemy Equipment. Part 1: German Mines and Traps - Engeland Voorschrift 26/GS Publications/997 WO 8007 Enemy Equipment Part II : Italian Mines and Traps. 1944 - Engeland Voorschrift 26/GS Publications/979