http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f99-subject=Helicopters) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f99-subject%3DHelicopters Results for your query: docsPerPage=100;f99-subject=Helicopters Thu, 01 Jan 1970 12:00:00 GMT Anything a horse can do: the story of the helicopter. Gregory, Hollingsworth Franklin, 1906- http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT The helicopters are coming. Macauley, Clinton B. F., 1911- http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Helicopters. National Aerospace Education Council (U.S.) http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT The complete book of helicopters. Ahnstrom, D. N. http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Aircraft pocket reference library. Doubleday & Company, Inc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Recollections and thoughts of a pioneer: presented at the Wings Club on November 16, 1964, New York City. Sikorsky, Igor Ivan, 1889-1972 http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Missions and milestones: the Boeing Company, Vertol Division. Boeing Company Vertol Division. http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT