http://www.rssboard.org/rss-specification 720 XTF Search Results (f1-format=Book;f2-subject=Aeronautics;f3-subject=Helicopters) http://catalog.wrhs.org/collections/search?f1-format%3DBook;f2-subject%3DAeronautics;f3-subject%3DHelicopters Results for your query: f1-format=Book;f2-subject=Aeronautics;f3-subject=Helicopters 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://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT