http://www.rssboard.org/rss-specification 720 XTF Search Results (f2-subject=Inventions;f3-subject=Technological innovations) http://catalog.wrhs.org/collections/search?f2-subject%3DInventions;f3-subject%3DTechnological%20innovations Results for your query: f2-subject=Inventions;f3-subject=Technological innovations Thu, 01 Jan 1970 12:00:00 GMT Black inventors. Aaseng, Nathan. 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