http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f3-format=Book;f4-subject=Aeronautics -- History;f5-subject=Sikorsky helicopters -- History) http://catalog.wrhs.org/collections/search?docsPerPage%3D100;f3-format%3DBook;f4-subject%3DAeronautics%20--%20History;f5-subject%3DSikorsky%20helicopters%20--%20History Results for your query: docsPerPage=100;f3-format=Book;f4-subject=Aeronautics -- History;f5-subject=Sikorsky helicopters -- History Thu, 01 Jan 1970 12:00:00 GMT Fifty years of firsts in flight, 1923-1973. Sikorsky, Igor Ivan, 1889-1972, Sikorsky Aircraft (Firm) 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