H. Hovhannisyan, S. Arevshatyan;                             Electronic Journal of Natural Sciences of NAS RA, Ecology, 1(2),                             2004,                                                         pp. 10-12;                                                     
                    

                        
Abstract
In the article, preliminary results of investigations of heavy metal (HM) pollution impact upon nitrogen metabolism in arboreous plants in Yerevan are given.
                    

                        
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