Polish Journal of Sport and Tourism
Polish Journal of Sport and Tourism > 2012 > 19 > 3 > 168-172
Polish Journal of Sport and Tourism > 2012 > 19 > 4 > 240-245
Polish Journal of Sport and Tourism > 2012 > 19 > 3 > 168-172
Polish Journal of Sport and Tourism > 2012 > 19 > 4 > 240-245