@inproceedings{sgem2021s22121,
  title = {FORMING A SYSTEM OF CARTOGRAPHIC CONCEPTS IN THE GEOGRAPHY TRAINING IN THE BULGARIAN SECONDARY SCHOOL},
  author = {Maya Vasileva},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Ecology, Economics, Education and Legislation},
  year = {2021},
  pages = {565-572},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2021/5.1/s22.121}
}