Stanislava Misheva. "IMPLEMENTATION OF THE CONCEPT FOR SUSTAINABLE DEVELOPMENT THROUGH STUDY EXCURSION IN GEOGRAPHY TRAINING." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Ecology, Economics, Education and Legislation (2020): 757-764. https://doi.org/10.5593/sgem2020/5.2/s22.093