Based at the University of Maryland, this remarkable digital collection brings together a range of special items related to labor in America. The digitized items within the collection document a range of specific labor unions, such as the United Brotherhood of Carpenters and Joiners of America, and offer insight into the development of the labor movement from colonial days to the present. A great variety of resources related to WPA projects and union labor throughout Maryland can be found here. An introduction to the collection by subject is a great place to start; after that, users can search around by subject heading, topic, or date of creation.