Keller, Charles <br/><br/>
Best knock-knock book ever / 
by Charles Keller ; illustrated by Jeff Sinclair. 
 - 1st ed. 
 - New York :  Sterling Publishing Co,  2000. 
 - 96p. 
<br/><br/><label>ISBN: </label>0806965134 
<br/><br/><label>LCCN: </label>99049402 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Knock-knock jokes.<br/>Jokes.