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Legal, 1919-1975.
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Executive Committee / Executive Board, 1922-1973.
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Annual and general meeting minutes and agendas, 1919-1979.
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Negotiations Committee, 1919-1987.
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Finance Committee, [ca. 1933]-1984.
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Other committee meeting minutes and agendas, 1919-1976.
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General correspondence, 1922-1987.
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Special projects and studies, 1932-1943.