Featherly, Jay Ko-Hoh : The Call of the Trumpeter Swan : by Jay Featherly; A Carolrhoda Nature Watch Book. - Minneapolis : Carolrhoda Books, 1986. - 48 p. : ill. ; 24 cm. ISBN: 0-87614-288-9 (lib. bdg.) Subjects--Topical Terms: Zoology--BirdsSwan--Juvenile literature