- C-SPAN Corporation1
- Clay Club of Morgantown1
- Corcoran Gallery of Art1
- Crane, Frank, 1861-19284
- Daniels, Josephus, 1862-194844
- Dennison, Louise, 1898-1991.1
- District of Columbia. Department of Public Works1
- Draper, Louis H., 1935-200225
- Dykstra, Vergil H., 1925-20101
- E. & H.T. Anthony (Firm)1
- Fall, Albert B. (Albert Bacon), 1861-194421
- Fox, Mary Elsie, 1923-19941
- George Mason University. Libraries1
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- George Washington University1