http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f6-subject=Geology -- Colorado) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f6-subject%3DGeology%20--%20Colorado Results for your query: docsPerPage=100;f6-subject=Geology -- Colorado Thu, 01 Jan 1970 12:00:00 GMT Annual report of the United States Geological and geographical survey of the territories: embracing Colorado and parts of adjacent territories; being a report of progress of the exploration for the year 1874. Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 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 First, second, and third annual reports of the United States geological survey of the territories for the years 1867, 1868, and 1869, under the Department of the Interior. Geological and Geographical Survey of the Territories (U.S.), Hayden, F. V. (Ferdinand Vandeveer), 1829-1887, First, second, and third annual reports of the United States geological survey of the territories 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