Ashley, W. J. (1904). The progress of the German working classes in the last quarter of a century. Longman, Green.
Chicago-referens (17:e uppl.)Ashley, W. J. The Progress of the German Working Classes in the Last Quarter of a Century. London ; New York ; Bombay: Longman, Green, 1904.
MLA-referens (8:e uppl.)Ashley, W. J. The Progress of the German Working Classes in the Last Quarter of a Century. Longman, Green, 1904.
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