$1KGa!0s'D&!4I!7y'4U!Ky'?('Kg!8W'YK'\QKN7!ONs - $1'_#'[)s ($1!4I!0a (B: s $1!04!7o!Na'CZ!O(':`!3K!JH!Na(B,s, 2017)
Keywords: China -- History -- Qing dynasty, 1644-1912; Manchuria (China) -- Environmental conditions; Manchuria (China) -- Social conditions