Wiener, Ron. The Economic Base of Leeds. Leeds, UK: Workers Educational Association, [no date found]

Wiener, Ron. The Economic Base of Leeds. Leeds, UK: Workers Educational Association, [no date found], Box: 3, Folder: 9. Robert Kraushaar papers, 6754. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/542733 Accessed May 10, 2025.