Өмнөд Африкт эрт үеийн нийгэмд уул уурхайн хөгжилд саад болж …
уул уурхайн хөгжилд саад болж байсан таван хүчин зүйл (PDF) Mongolian-Russian political relations The author has been studied modern Mongolian-Russian political relations since the beginning of the 1990s when the world political situation changed dramatically and the Soviet Union collapsed.