Author
Spencer, Herbert, 1820-1903
Bradford H. Gray Collection in the History of Social Thought (Beinecke Rare Book and Manuscript Library)
8
Yan, Fu, 1853-1921
7
Andreski, Stanislav
5
Lownes Science Collection (Brown University)
3
William B. Provine Collection on Evolution and Genetics
3
Collins, F. Howard (Frederick Howard), 1857-1910
2
Lester Frank Ward Collection (Brown University)
2
Mark B. Adams Emergence of Modern Science Collection (University of Pennsylvania)
2
Peel, J. D. Y (John David Yeadon), 1941-2015
2
Spencer, Herbert
2
Talcott Parsons Collection (University of Pennsylvania)
2
Ward Personal Library (Brown University)
2
Carneiro, Robert L (Robert Leonard), 1927-
1
Gotham Book Mart Collection (University of Pennsylvania)
1
Marquardsen, Heinrich, 1825-1897
1
Parsons, Talcott, 1902-1979
1
Peel, J. D. Y (John David Yeadon), 1941-
1
Rosengarten Family Fund
1
Rumney, Jay, 1905-
1
Rumney, Jay, 1905-1957
1
Youmans, Edward Livingston, 1821-1887
1
Zhang, Xiongwu
1