Microfilm. Jahrg. 1, Heft 1-5, 7-8 (1866:Jan.-Mai, Juli-Aug.). [Madison, Wis. : Collection Preservation Dept., Memorial Library, University of Wisconsin-Madison, 1981-]. 1 microfilm reel : negative ; 35 mm. (Serial publications of German trade unions in the Memorial Library, University of Wisconsin-Madison). [German Trade Unions ; Reel 85, no. 14]. Heft 1 (Jan. 1866) lacking p.1-2, p. 3-4 mutilated. Jahrg. 5, missing ad at end. Jahrg. 7: missing t.p