Petroski, Henry. <br/><br/>
The pencil :  a history of design and circumstance / 
by Henry Petroski 
 - 1st ed. 
 - New York :  Knopf,  1989 
 - xi, 434 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliography p. 385-407 and index 
<br/><br/><label>ISBN: </label>0679734155  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pencils--History