The state of the nation’s ecosystems :  measuring the lands, waters, and living resources of the United States / 
[edited by] the H. John Heinz III Center for Science, Economics, and the Environment 
 - Cambridge :  Cambridge University Press,  2002 
 - xviii, 270 p. :  col. ill., col. maps ;  28 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9780521525725 (pbk. : alk. paper) 0521525721 (pbk. : alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental monitoring--Methodology--United States<br/>Ecosystem health--United States