Fields, Rebecca D.,  <br/><br/>
Studies of Sulfur Dioxide impact on Lichens/ 
by Rebecca D. Fields. 
 - Provo, Utah:  Brigham Young University Press,  1983. 
 - 67 pages ;   23 cm. 
<br/><br/>Thesis (Ph.D)-Brigham Young University, 1983. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Effect of Sulphur dioxide on.<br/>Sulphur dioxide--Physiological effect.