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- International Association for the Scientific Study of Mental Deficiency. Congress (2)
- Vermeer, Adri (2)
- Borms, J. (Jan) (1)
- Davis, W. E. (Walter E.) (1)
- Hebbelinck, M. (Marcel) (1)
- International Council of Sport and Physical Education. Research Committee (1)
- Symposium on Motor Development and Adapted Physical Activity (1)