The Illustrated Science and Invention Encyclopedia. How it Works : Vol.12, (Mining Techniques Pantograph) 

 - Westport:  H.S. Stuttman Inc,  1983. 
 - 1529-1668p.;  col.ill.;  26 cm 
 - The Illustrated Science and Invention Encyclopedia .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science<br/>Encyclopedia
<br/><br/><label>Dewey Class. No.: </label>503  / ILL