Summer, W. <br/><br/>
Photosensitors :   a treatise on photo-electric devices and their application to industry /  
W. Summer 
 - London :   Chapman & Hall,   1957. 
 - 675 p. :   il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CELULAS FOTOELECTRICAS<br/>MEDIDAS FOTOELECTRICAS<br/>CONTROL REMOTO
<br/><br/><label>Universal Decimal Class. No.: </label>621.38