Hawksworth, D. L. <br/><br/>
Lichens as pollution monitors / 
David L. Hawksworth, Francis Rose. 
 - London :  Edward Arnold,  c1976. 
 - 60 p. :  ill., maps. 
 - Institute of Biology's studies in biology ;  no. 66 .
<br/><br/><label>ISBN: </label>0713125551 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lichens--Effect of air pollution on.<br/>Lichens--Effect of air pollution on.--Great Britain<br/>Plant indicators.<br/>Air--Pollution--Measurement.--Great Britain