The Encyclopedia of how it works from abacus to zoom lens / 
edited by Donald Clarke. 
 - New York :  A & W Publishers,  1977. 
 - 245 p. :  ill. (some col.). 
<br/><br/><label>ISBN: </label>0894790021 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--Popular works.