Grigoryan, A.T. “PRINCIPLES OF AGRICULTURE GREENING”. Proceedings of the YSU C: Geological and Geographical Sciences 48, no. 2 (234) (August 8, 2014): 47–53. Accessed November 21, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol48_no2_2014_pp047-053.