- Canada. Topographical Survey (1)
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- Chase, Ray P. (Ray Park), 1880-1948 (1)
- Chicago Architectural Photographing Company (Photographer) (50)
- Clark, J. C. (1)
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- Coleman, Robert H. (Robert Henry), 1869-1946 (1)
- Cooper, William Skinner, 1884-1978 (79)
- Cowles, S. M. (1)
- Currie Brothers Co. (1)
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- DeBoth, Jessie Marie (1)
- Department of Buildings and Grounds (1)
- Dixon, F. W. (2)
- Dworshak, Louis F., 1877-1963 (1)
- Earl Ferris Nursery (1)
- Earl May Seed & Nursery L.P. (1)
- Edson, Newell W. (1)
