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- Chapman, Charles S., 1879-1962 (12)
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- Christy, Howard Chandler, 1873-1952 (2)
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- Co-Operative Publishing Association, Superior, Wisconsin (1)
- Coffin, Haskell, 1878-1941 (1)
- Coleman, Robert Henry, 1869- (1)
- Collins, S. B. (1)
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- Cooper, William Skinner, 1884-1978 (5)
