Potosyan V. REGIONAL DIFFERENCES AND PROBLEMS OF THE SEX AND AGE STRUCTURE OF THE POPULATION OF RA. Proc. YSU C: Geol. Geogr. Sci. [Internet]. 2017 Apr. 10 [cited 2024 Nov. 21];51(1 (242):55-61. Available from: https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol51_no1_2017_pp055-061