General geological map of China.
[Peking] ; Nanking : Geological Survey of China,
1924-
Coverage incomplete; a few sheets for eastern China only.
NF-49: Canton (1948) -- NH-50: Hankow (1948) -- NI-50: Nanking (1928; 1948) -- NJ-49: Taiyuan (1926; 1948) -- NJ-50: Peking (1924) -- NJ-51: Tsingtao (1948)