Published by Proceedings of the Institute of Radio Engineers., n.p., 1935
Pamphlet. Condition: Near fine. Near fine in original wraps (slightly browned at spine. 6 pp. including 2 figures showing radio waves of interstellar origin. First publication of his important work on the existence of cosmic radio sources; Jansky founded radio astronomy with his determination that cosmic radio rays originated from a source in the center of our Milky Way. 23(1158)-1163.