Sargsyan, S.H. <br/><br/>
Basics of environment and ecology :  Academic manual / 
S.H. Sargsyan, G.F. Galstyan, H.G. Petrosyan ; MES  NPUA.  
 - Yerevan :  Chartaraget,  2017. 
 - 104 p. 
<br/><br/>References : p. 99-100  
<br/><br/><label>ISBN: </label>9789939725826 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Basics of environment and ecology -- Manuals