http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f4-subject=Mining corporations -- Arizona -- Tucson) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f4-subject%3DMining%20corporations%20--%20Arizona%20--%20Tucson Results for your query: docsPerPage=100;f4-subject=Mining corporations -- Arizona -- Tucson Thu, 01 Jan 1970 12:00:00 GMT Prospectus of the San Ricardo Mining Co: mines, San Ricardo & St. George, located in Ures Mining District. San Ricardo Mining Company 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