Mnatsakanyan, L. <br/><br/>
English grammar and usage :  academic manual / 
by L. Mnatsakanyan, H.S. Ghajoyan; Ministry of education and science ;National Polytechnic University of Armenia. 
 - Yerevan :  Chartaraget,  2015. 
 - 263 p. ;  20 cm. 
 - 42-8(075.8) (NLA) .
<br/><br/><label>ISBN: </label>978-9939-72-262-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Text-books for foreigners
<br/><br/><label>Universal Decimal Class. No.: </label>42-8(075.8) (NLA)