Air pollution and lichens / 
Edited by B. W. Ferry, M. S. Baddeley and D. L. Hawksworth 
 - Toronto :  University of Toronto Press,  1973 
 - x, 389 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0802019919 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lichens<br/>Plants, Effect of air pollution on<br/>Lichens--United Kingdom