Gray, Bernard Francis,   1924 <br/><br/>
Electronics level 1 :  systems and practice / 
B. F. Gray. 
 - London ;   New York :   Longman,   1977. 
 - vii, 163 p. :   ill. ;   22 cm. 
 - Longman technician series .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0582411319 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic apparatus and appliances.<br/>Electronics.