Major related manuscript collections at the State Historical Society of Wisconsin include the Elizabeth H. Thomas Papers, a small collection that includes a history of Berger and Socialism up to 1910; the Vorwaerts Publishing Company Minutes, 1906-1909; and the Milwaukee Social-Democratic Publishing Company Minutes, 1905-1935. The Milwaukee County Historical Society holds the Social Democratic Party collection, only part of which is filmed here. Both the State Historical Society of Wisconsin (816 State St., Madison, Wisconsin 53706) and the Milwaukee County Historical Society (910 N. Old World 3rd St., Milwaukee, Wisconsin 53203) hold extensive collections of manuscript and printed materials related to socialism.