http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f7-subject=Mineral waters -- Pennsylvania) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f7-subject%3DMineral%20waters%20--%20Pennsylvania Results for your query: docsPerPage=100;f7-subject=Mineral waters -- Pennsylvania Thu, 01 Jan 1970 12:00:00 GMT Second preliminary report on the mineralogy of Pennsylvania. Genth, Friedrich August Ludwig Karl Wilhelm, 1820-1893 https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT