Betts, John Arthur.
High frequency communications [by] J. A. Betts. - New York, American Elsevier Pub. Co. [1967] - 98 p. illus. 23 cm. - Introductory science texts .
Includes bibliographical references.
67023782
Shortwave radio.
TK6553 / .B42 1967b
621.3841/51
High frequency communications [by] J. A. Betts. - New York, American Elsevier Pub. Co. [1967] - 98 p. illus. 23 cm. - Introductory science texts .
Includes bibliographical references.
67023782
Shortwave radio.
TK6553 / .B42 1967b
621.3841/51