FM 17-27. Armored force. Field Manual 81-mm mortar squad and platoon
FM 23-90. Basic Field. Manual 81-мм Mortar M1
Handbook of the 9.45-inch Trench Mortar Materiel
FM 23-85. Field Manual 60-mm Mortar, M19
FM 23-90. Field Manual Mortars
FM 23-91. Field Manual Mortar gunnery
Handbook of the M.L. Strokes 3-Inch Trench Mortar Equipments
ORD 9 SNL A-43. List of all service parts of Mortar, 60-MM, T18E6, M2 and M19, mount M5
R.A.R.D.E. Memorandum 8_67 Bore pitting in 81mm mortar barrels
Technical Report ARLCB-TR-77031 Erosion in 81mm mortar tubes
Patent 1399243 Trench mortar (1921)
Patent 1471063 Trench mortar (1923)
Patent 1524273 Trench mortar and the like (1925)
Patent 1633710 Trench mortar and the like (1927)
Patent 3505924 Silent mortar (1970)
Patent 3731634 Waterproofing mortair ammunition (1973)