pt sembawang нүүрсний уурхайн батулицин
(pdf) ШАРЫН ГОЛЫН НҮҮРСНИЙ ИЛ УУРХАЙ ОРЧМЫН … Six (1987) and seven (2001, 2019) land use classes were recorded with overall accuracies from 84.8 to 85.3 percent. The area of coal open-pit and urban area increased from 5 percent in 1987 to 10 ...