Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls  [electronic resource] / 
edited by Luiz A. Martinelli, Robert W. Howarth. 
 - Dordrecht :  Springer,  2006. 
 - 274 p. :  ill., digital ;  24 cm. 
<br/><br/><label>ISBN: </label>9781402055171 (electronic bk.) 9781402047176 (paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life Sciences.<br/>Monitoring/Environmental Analysis/Environmental Ecotoxicology.<br/>Biogeosciences.<br/>Ecosystems.