http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f277-subject=Pennsylvania -- Altitudes) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f277-subject%3DPennsylvania%20--%20Altitudes Results for your query: docsPerPage=100;f277-subject=Pennsylvania -- Altitudes Thu, 01 Jan 1970 12:00:00 GMT Results of spirit leveling in Pennsylvania for the years 1899 to 1905 inclusive. Gannett, Samuel S. (Samuel Stinson), 1861-1939, Baldwin, David Henry, 1873-, Geological Survey (U.S.) 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