523.016 Smi R Smith, Alexander Goudy, 1919- Radio exploration of the planetary system [by] Alex G. Smith and T. D. Carr. Princeton, N. J., Published for the Commission on College Physics [ by ] Van tfostrand [cl9.64 ] vi, 148. p. ilus.gráficos. 21 cm. (Van Nostrand momentum books, no 2) "General biblipgraphy"p. 144, Bibliográfia al final de los capítulos.