Pamphlet no. 30. Combined Operations. Employment of Amphibians in Combined Operations.(Provisional). WO 7837 - Engeland Voorschrift Supplement no.3 to Army/Air Operations Pamphlet no.4. (chapter 3). Carriage of Artillery. Equipment by air. Section 3, Q.F. 3.7 Howitzer, Mark 1 on carriages 3-7 … Trianing Memorandum. no. 6. Royal Engineers. 1943 - Engeland Voorschrift 26/GS Publications/1021