Stories of inventions and discoveries :  For the 9th form of secondary school / 
 Рассказы об изобретениях и открытях 
Complid by B. Belitsky and A. Efimenko. 
 - Moscow :  Prosveshcheniye,  1970. 
 - 126 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language