"Transport planes." . . "Fragtfly." . . "Passagerfly." . . "Airlines Directories." . . . . "Lufttrafik." . . "Flyselskaber." . . "Flydata." . . "Airlines." . . "Treplanstegninger." . . . . . . "World airlines & airliners"@en . . . . . . . . . . "Directories"@en . "Directories" . "Guidebooks" . . . . . . "The Observer's World Airlines an Airliners Directory" . . . . . . "The Observer's world airlines and airliners directory"@en . "The Observer's world airlines and airliners directory" . . . . . "The observer's world airlines and airliners directory" .