Author
SpringerLink (Online Service)
76
ScienceDirect (Online service)
49
United States. National Park Service
34
SpringerLink (Online service)
33
Films for the Humanities & Sciences (Firm)
30
Infobase
30
Infobase,
10
Pandi-Perumal, S. R.
7
Geological Survey (U.S.)
6
Information Television Network
6
Pandi-Perumal, S. R.,
6
United States. Food and Drug Administration. Office of Women's Health,
6
United States. National Park Service,
6
BBC Worldwide Ltd
5
Chokroverty, Sudhansu
5
Chokroverty, Sudhansu,
5
National Heart, Lung, and Blood Institute
5
United States,
5
Attarian, Hrayr P.
4
EBSCOhost
4
Monti, Jaime M.,
4
National Center for Health Statistics (U.S.),
4
National Institute on Aging,
4
Oxford Scholarship Online
4
United States. Congress. House. Committee on Transportation and Infrastructure,
4
Van Dongen, Hans P. A., 1969-
4
Attarian, Hrayr P.,
3
Cardinali, Daniel P.
3
Cinetic Rights Management LLC. (Firm)
3
Dement, William C., 1928-2020
3
German United Distributors
3
Gozal, David,
3
Hobson, J. Allan, 1933-
3
National Center on Sleep Disorders Research (National Heart, Lung, and Blood Institute)
3
Natural Resource Program Center (U.S.),
3
United States. National Highway Traffic Safety Administration
3
Wood, Don, 1945-
3
ABC International
2
American Sleep Disorders Association
2
BaHammam, Ahmed,
2
Badr, M. Safwan
2
Barkoukis, Teri J.
2
Belenky, Gregory
2
Berry, Richard B., 1947-
2
Black, Lindsey I.,
2
DelRosso, Lourdes M.,
2
Drucker-Colín, René Raúl
2
Effective Health Care Program (U.S.),
2
Eunice Kennedy Shriver National Institute of Child Health and Human Development (U.S.),
2
Friedman, Michael, 1948-
2
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