How it works :  the illustrated encyclopedia of science and technology / 
Edited by Ralph Hancock...[et al.]. 
 - New york :  Marshall Cavendish,  c 1977. 
 - Vols. :  ills. ;  28 cm. 
<br/><br/>V. 7- Earthmoving machinery fibre ; 
<br/><br/>344  344 
<br/><br/><label>ISBN: </label>0 85685 210 4 0 85685 217 1 
<br/><br/><label>ISSN: </label>76-26838 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dictionaries & encyclopedias.<br/>Science and technology
<br/><br/><label>Dewey Class. No.: </label>503 / I6