Spies, W H <br/><br/>
Power Machines N6 / 
W. H. Spies 
 - First edition, twelfth impression 
 - Macmillan South Africa :  Troupant ,  2017. 
 - 160 pages :   illustrations ;   24 cm 
<br/><br/><label>ISBN: </label>9781919780320 (paperback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Power (Mechanics)<br/>Heat engineering
<br/><br/><label>Dewey Class. No.: </label>ST 621.4 SPIE