Updegraff, Imelda <br/><br/>
Rivers and lakes / 
Imelda Updegraff. 
 - Methuen Children's Books :  Londres,  1980. 
 - 23 p. :  il. ;  20 cm 
<br/><br/><label>ISBN: </label>0416881408 
<br/><br/><label>Subjects--Index Terms: </label>Rios Lagos Erosión Glaciares