LESSONS In WIRELESS TELEGRAPHY. A Systematic Elementary Course in the Principles of Wireless Telegraphy and the Electrical Laws Upon Which It Depends.; Arts and Sciences No. 3
New York City: Published by Cole & Morgan, Inc., (1917). Fourth Impression of the Revised & Enlarged Third Edition. 72 pp. Illustrated. 12mo. 7" x 4-1/2". Red & black paper covers, lettered in white. More