SUHERMAN, S; HANAFIAH RAMBE, Ali; WIDODO TANJUNG, Agustiar. Underground Radio Propagation on Frequency Band 97 Mhz – 130 Mhz. International Journal of Engineering & Technology, [S. l.], v. 7, n. 3.2, p. 722–726, 2018. DOI: 10.14419/ijet.v7i3.2.15352. Disponível em: https://www.sciencepubco.com/index.php/ijet/article/view/15352.. Acesso em: 3 may. 2024.