Physical education and life-long physical activity : the proceedings of the Jyväskylä sport congress Movement and Sport - a Challenge for Life-Long Learning, AIESEP World Convention, June 17-22, 1989, at the University of Jyväskylä, Finland / ed. by Risto Telama.    Jyväskylä :  The Foundation for Promotion of Physical Culture and Health,  1990 . 612 s.