the observers series Observers aircraft / William Green ; with silhouettes by Dennis Punnett Wat is dat voor een vliegtuig? / William Green ; Ned. vert. van B. van der Klauw ; silhouetten van Dennis Punnett warplanes of the third Reich / William Green ; with line-drawings by Dennis Punnett the new observer's series New observer's Book of Aircraft / compiled by William Green ; with silhouettes by Dennis Punnett the new observer’s series New Observer's Book of Aircraft / compiled by William Green ; with silhouettes by Dennis Punnett
