West Philadelphia Collaborative History - Clarence H. Clark Mansion
Clarence Clark
A Descriptive Catalogue Of The Books Forming The Library Of Clarence H. Clark ... Philadelphia, Volume 1: Clark, Clarence Howard, Thomson, John: 9781247764214: Amazon.com: Books
Clarence D. Clark, Longtime U.S. Senator | WyoHistory.org
Clarence Howard Clark | Ornithology Collection Donors | Research at The Academy of Natural Sciences of Drexel University