http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f59-subject=Mines and mineral resources -- Pennsylvania) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f59-subject%3DMines%20and%20mineral%20resources%20--%20Pennsylvania Results for your query: docsPerPage=100;f59-subject=Mines and mineral resources -- Pennsylvania Thu, 01 Jan 1970 12:00:00 GMT Pennsylvania's mineral heritage: The commonwealth at the economic crossroads of her industrial development. Pennsylvania Dept. of Internal Affairs. Bureau of Statistics., Pennsylvania Bureau of Topographic and Geologic Survey, Pennsylvania State College School of Mineral Industries. 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 The pictorial sketch-book of Pennsylvania: or, its scenery, internal improvements, resources, and agriculture, popularly described. Bowen, Eli, b. 1824 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 The pictorial sketch-book of Pennsylvania: Or, its scenery, internal improvements, resources, and agriculture. Bowen, Eli, b. 1824 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