The way things work; an illustrated encyclopedia of technology. 

 - New York, Simon and Schuster [1967-71]. 
 - v. : il. ; 22 cm. 
<br/><br/><label>ISBN: </label>0-671-22621-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tecnología -- Obras -- Enciclopedia. \
<br/><br/><label>LC Class. No.: </label>C T47 W39