field manual Operations of engineer field units field manual Corps of engineers : construction and routes of communication field manual Air navigation / prepared under direction of the chief of the air corps field manual Weather field manual Reviews and inspection / Prepared under direction of the chief of the air corps Reglement betreffende de krijgstucht voor Nederlands-Indië (R.K.) : uitgave 1945 / Koninklijk Nederlands Indisch Leger field manual Browning machine gun caliber .30, HB, M1919A4 (mounted in combat vehicles) / prep. under dir. of the Chief of Infantry field manual Browning machine gun, caliber .30, M1917 field manual 81-MM mortar, MI / Prepared under direction of the chief of infantry field manual 81-MM mortar squad and platoon field manual 75-mm tank gun M 2 : (mounted in medium tank M 3) Permits for work in navigable waters / Corps of engineers ; Department of the army