Academy of Science and Technology in Cracow http://www.agh.edu.pl.
Head Office of Geodesy and Cartography http://www.gugik.gov.pl.
Technical Instructions http://www.geobid.pl/instrukcje/.
Notes on the Internet - Home of the competition http://www.notatki.cel.agh.edu.pl.
Polish Geodetic Reference Online http://www.geodezja.net.
Teaching aids - field book http://www.geod.agh.edu.pl/portal/index.php/strony/dydaktyka.