Irina Pilvere (2018). ORGANIC SOIL AREA AND THE GEOGRAPHIC LOCATION AND QUALITY THEREOF IN LATVIA. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 607-614. https://doi.org/10.5593/sgem2018/5.3/s28.078