Knapp, Mary. <br/><br/>
One potato, two potato... :  the folklore of American children / 
by Mary and Herbert Knapp. 
 - New York, N.Y. :  W.W. Norton & Company,  1976. 
 - xii, 274 p. 
<br/><br/> Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0393090396 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Folk-lore--United States.<br/>Folk-lore of children.