Administration in the arctic - USA Voorschrift, Field Manual, 31-72 Medium and heavy antiaircraft artillery - USA Voorschrift, Field Manual, 44-4 Service of the operations center AN/MTQ-1 - USA Voorschrift, Field Manual, 44-9 Antiaircraft fire control system M33 - USA Voorschrift, Field Manual, 44-33A Service of the M9 and M10 type antiaircraft directors - USA Voorschrift, Field Manual, 44-38 Service of the piece 37-mm fire unit - USA Voorschrift, Field Manual, 44-58 Barriers and denial operations - USA Voorschrift, Field Manual, 31-10 Barriers and denial operations - USA Voorschrift, Field Manual, 31-10 Guerilla warfare and special forces operations - USA Voorschrift, Field Manual, 31-21 Aviation in support of ground forces - USA Voorschrift, Basic Field Manual, 31-35 Air-ground operations - USA Voorschrift, Field Manual, 31-35 Combat in fortified and built-up areas. - USA Voorschrift, Field Manual, 31-50