http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f9-subject=Cost) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f9-subject%3DCost Results for your query: docsPerPage=100;f9-subject=Cost Thu, 01 Jan 1970 12:00:00 GMT Relation of wages to cost of production. Wadlin, Horace Greeley, 1851-1925, Massachusetts Bureau of Statistics of Labor. 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