Dariusz Popielarczyk, Marta Augustynowicz (2017). INVESTIGATION OF UNDERWATER OBJECTS ON THE NAREW RIVER BOTTOM BETWEEN MODLIN FORTRESS AND GRANARY. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing, 375-382. https://doi.org/10.5593/sgem2017/22/s09.047