Voorhoeve, Nicolaas Anthony Johannes,  1894-, <br/><br/>
Low-frequency amplification :  A treatise on the technical and scientific principles and the modern practical use of l. f. amplifications / 
By n. a. j. voorhoeve ; english translated by g. ducloux-sutton 
 - 495 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Micrófonos<br/>Amplificadores de tubos de vacío
<br/><br/><label>LC Class. No.: </label>TK6565.A55  / V6613