HADI, Khalid A. Study the orientation and distance factors effects on the lower usable frequency ((LUF)) over middle east region. Iraqi Journal of Physics, Baghdad, Iraq., v. 10, n. 18, p. 105–110, 2012. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/755.. Acesso em: 21 nov. 2024.