Postan 1952, p. 1. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, pp. 1–2, 6–7. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, pp. 9, 27–29. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, pp. 29–30. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, p. 73. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, pp. 33–34 72. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, p. 72. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Postan 1952, pp. 72–73. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.
Edmonds 1928, p. 267. Edmonds, J. E. (1928). Military Operations France and Belgium, 1915: Battles of Aubers Ridge, Festubert and Loos. History of the Great War Based on Official Documents by Direction of the Historical Section of the Committee of Imperial Defence. Vol. II. London: Macmillan. OCLC58962526.
Postan 1952, p. 117. Postan, M. M. (1952). British War Production. History of the Second World War: United Kingdom Civil Series. London: HMSO. OCLC459583161.