Origin of Purple and Violet Porphyritic Mudrocks in Under Permian of Yuxian, Henan Province[J]. COAL GEOLOGY & EXPLORATION, 1985, 13(3): 8-12.
Citation: Origin of Purple and Violet Porphyritic Mudrocks in Under Permian of Yuxian, Henan Province[J]. COAL GEOLOGY & EXPLORATION, 1985, 13(3): 8-12.

Origin of Purple and Violet Porphyritic Mudrocks in Under Permian of Yuxian, Henan Province

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