Effects of gaseous air pollution in agriculture and horticulture / 
M. H. Unsworth and D. P. Ormrod ... (et al.) 
 - London :  Butterworths :  1982 
 - 532 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0408107057 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Effects of pollution on--Congresses