@inproceedings{sgem2013s05010,
  title = {GEOMAGNETIC FIELD AND SECULAR VARIATIONS OF THE ASTRONOMICAL PARAMETARS},
  author = {Delipetrov, Todor and Avramovska, Rada and Blazev, Krsto and DonevaDelipetrev, Blagica},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING},
  year = {2013},
  pages = {757 - 764 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2013/ba1.v2/s05.010}
}