TY - GEN L1 - http://pbc.gda.pl/Content/26140/czynniki_warunkujace_uprawianie.pdf L2 - http://pbc.gda.pl/Content/26140 KW - qualified tourism KW - mountain tourism KW - physical activity T1 - Factors determining practising qualified mountain tourism by the students of the institute of physical education in Szczecin UR - http://pbc.gda.pl/dlibra/publication/edition/26140 ER -