Electronics :  electronic devices for timing , counting , measurement process control, inspection, etc. with a survey of medical and surgical aids/ 
edited by Harry Fredrick Trewman 
 - London :  Sir ISAAC Pitman,  1949 
 - 188 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic apparatus and appliances