Study the orientation and distance factors effects on the lower usable frequency ((LUF)) over middle east region. Iraqi Journal of Physics, [S. l.], v. 10, n. 18, p. 105–110, 2012. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/755.. Acesso em: 17 may. 2024.