Boumphrey, Geoffrey Maxwell,  1894- <br/><br/>
Engines and how they work / 
Geoffrey Maxwell Boumphrey ; illustrated by S. J. Graham Browne 
 - London :  Vista Books,  1960 
 - 255 p. :  ill.su. ;  24 cm. 
 - The Franklin Watts illustrated science books .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanical engineering--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>621