※一部利用できない機能があります
- National Learning Corporation (2)
- National Recreation Association (2)
- Bowers, Ethel (1)
- Butler, George D. (George Daniel), 1893- (1)
- Central Council of Physical Recreation (1)
- Conrad, Randy B. (1)
- Damkroger, Ernest L. (1)
- Gardner, Ella (1)
- Goodale, Thomas L. (1)
- Great Britain. Board of Education (1)
- Hawkins, D. E. (1)
- Keene, Frances W. (1)
- Leavitt, Norma M. (1)
- Miles, Caswell Moore (1)
- Mitchell, Elmer Dayton, 1889- (1)
- Moris M Bruker (1)
- Nash, Jay Bryan, 1886- (1)
- National Recreation and Park Association (1)
- National Workshop on Recreation (1)
- Neumeyer, Esther Sternberg (1)
- Neumeyer, Martin Henry (1)
- Oettinger, Katherine B. (1)
- President's Council on Physical Fitness (U.S.) (1)
- Price, Hartley D. (1)
- Sapora, Allen Victor Heimbach, 1912- (1)
- United States. National Park Service (1)
- Witt, Peter A. (1)