NILSON, ARTHUR R.
Radio operating questions, and answers, by Arthur R. Nilson & J. L. Hornung. 5th ed.
NILSON, ARTHUR R. Radio operating questions, and answers, by Arthur R. Nilson & J. L. Hornung. 5th ed. © 17Mar33; A60904. J. L. Hornung (A); 29Aug60; R262294.
J. L. Hornung|A