VALACH, Fridrich, Magdaléna VÁCZYOVÁ, Dalibor VÝBERČI, and Eduard KOČI. “Regular Observations of the Geomagnetic Field at the Ógyalla Observatory (present-Day Hurbanovo) Near the Turn of the 20th Century, Including Magnetic Storms Accompanied by Auroras in March 1894, September 1898, and October 1903”. Contributions to Geophysics and Geodesy 54, no. 1 (April 1, 2024): 23-48. Accessed April 20, 2024. https://journal.geo.sav.sk/cgg/article/view/497.