TY  - BOOK
AU  - Mnatsakanyan,L.
AU  - Ghajoyan,H.S
AU  - Ghazaryan H.
ED  - Ministry of education and science
ED  - National Polytechnic University of Armenia
TI  - English grammar and usage: academic manual 
SN  - 978-9939-72-262-7
PY  - 2015///
CY  - Yerevan
PB  - Chartaraget
KW  - English language
KW  - Text-books for foreigners
ER  -