RADIO CODE MANUAL
Twenty Lessons on the Radio Code and Selected Projects on Code-learning Equipment
ARTHUR R. NILSON
Chief Instructor, Nilson Radio School, New^ York, N. Y. Lieutenant (Technicist) (Communications) U. S. N. R. (Retired); Member Institute of Radio Engineers ■
First Edition Fourth Impression
McGRAW-HIIxliÜÖit 'COMPANY, Inc.
NEW YORK AND LONDON 1942