Thomson, J. <br/><br/>
Frequency conversion / 
J. Thomson, W.E. Turk, M.J. Beesley. 
 - London :  Wykeham Publications,  1969. 
 - viii, 207 p. : ill. 
 - Wykeham technological series .
<br/><br/>Part I: Common conversion devices / J. Thomson. - - Part II: Light conversion devices / W.E. Turk. - - Part III: Masters and Lasers / M.J. Beesley. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frequency changers.