Bennett, J P <br/><br/>
16-year trends in elements of lichens at Theodore Roosevelt National Park, North Dakota.  [electronic resource] 

 -  The Science of the total environment  Dec 2000 
 - 231-41 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>0048-9697 
<br/><br/><label>Standard No.: </label>10.1016/s0048-9697(00)00711-7  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Monitoring--methods<br/>Lichens--chemistry<br/>Metals, Heavy--analysis<br/>Retrospective Studies<br/>Soil Pollutants--analysis