Hausmann, Erich. <br/><br/>
Telegraph engineering;  a manual for practicing telegraph engineers and engineering students, 
by Erich Hausmann ... With 192 illustrations. 
 - New York,  D. Van Nostrand company,  1915. 
 - xii, 406 p.  illus., diagrs.  22 cm. 
<br/><br/><label>LCCN: </label>15004410  
<br/><br/><label>Subjects--Topical Terms: </label><br/>TELÉGRAFOS