Author
Aristotle
92
Eighteenth Century Collections Online
36
ProQuest Ebook Subscriptions
32
U.S. Fish and Wildlife Service
32
ProQuest (Firm)
31
Society for the Study of Fertility
28
World Health Organization
27
Hafez, E. S. E. (Elsayed Saad Eldin), 1922-
24
Harvey, William, 1578-1657
23
Clarence J. Marshall Memorial Library Fund
22
SpringerLink (Online service)
21
Culture Class Collection (University of Pennsylvania)
19
Short, R. V. (Roger Valentine), 1930-
19
Austin, C. R. (Colin Russell), 1914-2004
18
Weir, Barbara J.
16
Attenborough, David, 1926-
15
British Broadcasting Corporation
15
Marshall, F. H. A. (Francis Hugh Adam), 1878-1949
15
Norris, David O.
15
Salmon, William, 1644-1713
15
Diczfalusy, Egon
14
Maupertuis, 1698-1759
14
England, Gary C. W.
13
Greek Culture Class Collection (University of Pennsylvania)
13
Weismann, August, 1834-1914
13
Aristotle (Medical writer)
12
Gourmont, Remy de, 1858-1915
12
Heller, Ruth, 1924-2004
12
Lopez, Kristin H.
12
Rowlands, I. W.
12
WGBH (Television station : Boston, Mass.)
12
International Coordination Committee for the Immunology of Reproduction
11
Johnson, M. H.
11
National Wetlands Research Center (U.S.)
11
Pandian, T. J.
11
Parkes, A. S. (Alan Sterling), 1900-1990
11
ScienceDirect (Online service)
11
Society for the Study of Reproduction
11
Warner Home Video (Firm)
11
Center for Population Research (National Institute of Child Health and Human Development (U.S.))
10
Darwin, Charles, 1809-1882
10
Early English Books Online
10
Fraenkel-Conrat, Heinz, 1910-1999
10
Jamieson, Barrie G. M. (Barrie Gillean Molyneux)
10
Nilsson, Lennart, 1922-2017
10
Perry, J. S. (John Sherwood)
10
Wagner, Robert R., 1923-
10
Aristotle, pseud
9
Biblioteca apostolica vaticana
9
Davies Morel, Mina C. G.
9
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