Orr, William Ittner <br/><br/>
Cubical Quad antennas  how to build and adjust quads 
William I. Orr, Stuart D. Cown. 
 - 3rd ed. 
 - Lakewood, N.J.  Radio Amateur Callbook  1993, c1972 
 - 109 p.  ill. 
<br/><br/><label>ISBN: </label>0823087034 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shortwave radio--Antennas.