http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f70-subject=Working class -- United States -- Archival resources) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f70-subject%3DWorking%20class%20--%20United%20States%20--%20Archival%20resources Results for your query: docsPerPage=100;f70-subject=Working class -- United States -- Archival resources Thu, 01 Jan 1970 12:00:00 GMT Labor history archives in the United States: a guide for researching and teaching. Leab, Daniel J., Mason, Philip P. (Philip Parker), 1927- 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