01203cam a2200265 4500 68248304 TxAuBib 20100923120000.0 070907s2008||||||||||||||||||||||||eng|u 2007037141 9780802796868 $17.95 0802796869 $17.95 DLC DLC IG# BAKER BTCTA SPP TxAuBib Patent, Dorothy Hinshaw. When the wolves returned : restoring nature's balance in Yellowstone / Dorothy Hinshaw Patent ; photographs by Dan Hartman and Cassie Hartman. New York : Walker, 2008. 39 p. : ill. (some col.) ; 26 cm. Includes bibliographical references (p. [40]) and index. When wolves were eliminated from Yellowstone National Park the natural system was out of balance. Shows the return of the wolves to the park and the natural balance being restored. 20100923. Wolves Reintroduction Yellowstone National Park Juvenile literature. Yellowstone National Park Juvenile literature. Hartman, Dan, 1955- Hartman, Cassie,.