Polish Journal of Sport and Tourism
Polish Journal of Sport and Tourism > 2014 > 21 > 3 > 151-156
Polish Journal of Sport and Tourism > 2014 > 21 > 3 > 163-167
Polish Journal of Sport and Tourism > 2014 > 21 > 3 > 151-156
Polish Journal of Sport and Tourism > 2014 > 21 > 3 > 163-167