1. The history of May Day Title: The history of May Day Date: 1947. Author: Trachtenberg, Alexander, 1884-1966. Collecting Area: Political Pamphlets Call number: HD 7791 T73 1947 LOCAL
2. The history of May Day Title: The history of May Day Date: 1935. Author: Trachtenberg, Alexander, 1884-1966. Collecting Area: Political Pamphlets Call number: HD 7791 T73 1935 LOCAL
3. The history of May Day Title: The history of May Day Date: 1931. Author: Trachtenberg, Alexander, 1884-1966. Collecting Area: Political Pamphlets Call number: HD 7791 T73 1931 LOCAL
4. Eight hours by law : a practical solution. Title: Eight hours by law : a practical solution. Date: 1894. Collecting Area: Political Pamphlets