Hawksworth, David L <br/><br/>
Lichens as pollution monitors 

 - London  Edward Arnold  1976 
 - [4],59 p.  Illustration 
 - Studies in Biology, No.66 .
<br/><br/><label>ISBN: </label>0713125551 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BOTANY
<br/><br/><label>Dewey Class. No.: </label>589.1045  / HAW