Patent, Dorothy Hinshaw. <br/><br/>
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 x 29 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/> Booklist.  Horn Book.  Library Media Connection starred. 
<br/><br/> Discusses how the wolf, once returned to Yellowstone National Park, helped restore balance to the ecosystem by minimizing the predation of coyotes on smaller creatures, keeping the elk herd on the run, thereby helping more aspen and willow trees to grow, and influencing other previously misunderstood dynamics. 
<br/><br/> 6.0  Follett Library Resources.  3-6  Follett Library Resources. 
<br/><br/><label>ISBN: </label>0329728733 0802796869 0802796877 (lib. bdg.) 9780329728731 (Follett bdg.) 9780802796868 9780802796875 (lib. bdg.) 
<br/><br/><label>LCCN: </label>2007037141 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wolves--Reintroduction--Yellowstone National Park--Juvenile literature.<br/>Wolves--Reintroduction--Yellowstone National Park--Pictorial works--Juvenile literature.<br/>Wildlife reintroduction.<br/>Wolves.<br/>Wildlife conservation.<br/>Wolves.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Yellowstone National Park--Juvenile literature.<br/>Yellowstone National Park.<br/>Yellowstone National Park.
<br/><br/><label>LC Class. No.: </label>QL737.C22  / P385 2008 
<br/><br/><label>Dewey Class. No.: </label>599.773/177/09787/52