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Positive behavior management in physical activity settings
Barry W. Lavay, Ron French, Hester L. Hen...
Bok Engelsk 2006
Positive behavior management strategies for physical educators
Barry W. Lavay, Ron French, Hester L. Hen...
Bok Engelsk 1997
Physical activity for individuals with mental retardation : infancy through adulthood
Carl B. Eichstaedt, Barry W. Lavay
Bok Engelsk 1992