William E. Forbath, “The Ambiguities of Free Labor: Labor and the Law in the Gilded Age,” Wisconsin Law Review, 1985, pp. 767-817, https://litigation-essentials.lexisnexis.com/webcd/app?action=DocumentDisplay&crawlid=1&doctype=cite&docid=1985+Wis.+L.+Rev.+767&srctype=smi&srcid=3B15&key=0e8d4a6c10421ab8027194283f3b3251