Hanna Hrehorowicz – Gaber (2018). PROTECTION PROBLEMS OF RIVER VALLEYS OF BESKID SADECKI IN THE CONTEXT OF THE DEVELOPMENT OF SETTLEMENT STRUCTURES. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 747-754. https://doi.org/10.5593/sgem2018/5.2/s20.097