Author
American Alliance for Health, Physical Education, Recreation, and Dance
4
Fundação Técnica e Científica do Desporto (Portugal)
2
International Council for Health, Physical Education, Recreation, Sport and Dance
2
American Alliance for Health, Physical Education, and Recreation
1
American Association for Health, Physical Education, and Recreation
1
National Association for Campus Activities (U.S.)
1
National Geographic Society (U.S.)
1
National Therapeutic Recreation Society (U.S.)
1
Strong (History Museum)
1
Strong National Museum of Play
1
United States Olympic Committee. Committee on Sports for the Disabled
1