The propagation of radio waves along the surface of the earth and in the atmosphere
By: by P.O. Pedersen
Publisher: Danmarks naturvidenskabelige samfund
Published: 1927
Place of publication: Copenhagen
Language: eng
Notes: At head of title: Danmarks naturvidenskabelige samfund. A. nr 15a. Udgivet ved Udvalget for ingeniørvidenskabelig forskning.

Vol. [2] is marked A. nr. 15b appendix, and consists of diagrams.