* Sykes, T. (editor) "The DH104 Dove and DH114 Heron" Tonbridge, Kent, UK: Air-Britain (Historians) Ltd, 1973.
"De Havilland Aircraft since 1909", Putnam & Company Ltd, 1978, ISBN 0-370-30022-X* Sykes, T. "The DH104 Dove and DH114 Heron", Air-Britain (Historians) Ltd, 1973, ISBN none