Schiettabel Mortier 4.2 inch. M 30. VS 7-335 Schiettabel de Mortier van 2 inch. VS 7-338 Mortier van 5. Opleiding. VVS 1506 Mortier 4.2 inch. M30. Wapenleer. VS 9-571 Mortier 4.2. inch. M30. Wapenleer. Schietvoorschrift. VS 9-571 Aids to Weapon Training some ideas on improvisation Small arms training : / War Office. Army Council. Vol. I. Pamphlet no. 9: Mortar (3-inch) : (India) Small arms training : Mortar (3-inch) : (India) / War Office. Army Council. Vol. I