Petroski, Henry. <br/><br/>
The pencil :  a history of design and circumstance / 
by Henry Petroski. 
 - 1st ed. 
 - New York :  Knopf :  Distributed by Random House,  1990. 
 - xi, 434 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 385-407. 
<br/><br/><label>ISBN: </label>0394574222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pencils--History.
<br/><br/><label>LC Class. No.: </label>TS1268  / .P47 1990 
<br/><br/><label>Dewey Class. No.: </label>674/.88