Microfilm. 1930-1932. [Madison, Wis. : Collection Preservation Dept., Memorial Library, University of Wisconsin-Madison, 1981-]. 1 microfilm reel(s) : negative ; 35 mm. (Serial publications of German trade unions in the Memorial Library, University of Wisconsin-Madison). [German Trade Unions ; Reel 46, no. 4]. Filmed with : Jahres-Bericht : erstattet vom Vorstand des Verbandes / Verband der Bergarbeiter Deutschlands.