rIotgF2JynyFAPADX[..]
Неизвестно
Kasbiy ma’naviyat.
Masharipova G., Xo‘janova T.
Biosfera, ekosfera, geoekologiya, geoekologik o'lkashunoslik
Power System Analysis and Design by Glover and Sarma_4thed
Research Mathodology : Methods and Techniques
C.R. Kothari