XTF Search Results (docsPerPage=100;f255-subject=Vacuum-tubes)

http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f255-subject=Vacuum-tubes) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f255-subject%3DVacuum-tubes Results for your query: docsPerPage=100;f255-subject=Vacuum-tubes Thu, 01 Jan 1970 12:00:00 GMT The birth of the vacuum tube: "the Edison effect.". Humy, Fernand Emile d', 1873-1955 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