Glossary of Code Names and Abbreviations, pp 417-419. Book call no. The Rise and Fall of the German Air Force, 1933-1945 . New York, St Martin's Press, 1983. First published in Great Britain by the Air Ministry, AM Pamphlet no.
Book call no.
The Royal Air Force . Compiled and Edited by Eric Sargent. 2nd Edition ed. Index, pp 795-810. Book call no.