Manuela Ingaldi (2018). ECOLOGICAL HOUSEHOLDS IN POLAND- INTRODUCTION. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 257-264. https://doi.org/10.5593/sgem2018/5.3/s28.032