Good yule :   the pagan roots of nordic christmas customs. 

 - Washington-XXU :   American Folklife Center,   1989. 
 - p. 5-8 :   il. 
 - Trimestral 
 - Vol. XI, no. 1(Win.1989) 
 - Folklife center news ;   Vol. XI, no. 1 .
<br/><br/><br/>Inglés.