Oxford junior encyclopaedia /  
edited by	Laura E. Salt and Robert Sinclair ; Illustrated by Helen Mary Petter. 
 - London :    Oxford University Press,  1957. 
 - Vols. :  ill. ;   25 cm.  
<br/><br/>V. 8- Engineering ;  
<br/><br/>324  324 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>032 / O2