United Brick and Clay Workers of America
| Role | Title | Holding Repository | |
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| creatorOf | United Brick and Clay Workers of America. [Constitutions, agreements, etc.] | Wisconsin historical society | |
| referencedIn | Copelof, Maxwell, 1879-. Papers, 1940-1954 | Harvard Law School Library Langdell Hall Cambridge, MA 02138 | |
| referencedIn | Hilpert, Elmer E., 1905-1975. Elmer E. Hilpert series 1. General arbitration files, part b, 1948-1975. | Cornell University Library |
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| associatedWith | Copelof, Maxwell. | person |
| associatedWith | Hilpert, Elmer E., 1905-1975. | person |
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