http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f313-subject=Valves) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f313-subject%3DValves Results for your query: docsPerPage=100;f313-subject=Valves Thu, 01 Jan 1970 12:00:00 GMT Safety valves: their history, antecedents, invention and calculation. Le Van, W. Barnet (William Barnet), 1829- 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