“A STUDY OF RADIO WAVE PROPAGATION IN THE CAVE FOR DEVELOPING THE THROUGH-THE-EARTH APPLICATION”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 26, no. 118, pp. 74–86, Jun. 2024, Accessed: Aug. 18, 2026. [Online]. Available: https://geomatejournal.com/geomate/article/view/4394