Polish Journal of Sport and Tourism
Polish Journal of Sport and Tourism > 2013 > 20 > 1 > 44-50
Polish Journal of Sport and Tourism > 2013 > 20 > 4 > 288-293
Polish Journal of Sport and Tourism > 2013 > 20 > 1 > 44-50
Polish Journal of Sport and Tourism > 2013 > 20 > 4 > 288-293