TY  - BOOK
AU  - Galstyan,G.F.
AU  - Petrosyan,H.G.
ED  - National polytechnic university of Armenia.
TI  - Basics of environment and ecology tests and tasks: student book 
SN  - 9789939729404
PY  - 2020///
CY  - Yerevan
PB  - Chartaraget
KW  - Ecology
KW  - Handbook
N1  - Includes bibliographical references
ER  -