Joanna Jaroszewicz (2015). ANALYSIS OF HYPSOMETRIC TINTS USED TO REPRESENT LANDFORMS ON POLISH MAPS ISSUED IN THE YEARS 1850-2004. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. https://doi.org/10.5593/sgem2015/b22/s11.085