Study on Tonstein within Coal Seam C<sub>8</sub> of Upper Permian in Southern Sichuan

Study on Tonstein within Coal Seam C8 of Upper Permian in Southern Sichuan[J]. COAL GEOLOGY & EXPLORATION, 1987, 15(5): 1-8.

Citation:

Study on Tonstein within Coal Seam C8 of Upper Permian in Southern Sichuan[J]. COAL GEOLOGY & EXPLORATION, 1987, 15(5): 1-8.

Citation:

Study on Tonstein within Coal Seam C8 of Upper Permian in Southern Sichuan[J]. COAL GEOLOGY & EXPLORATION, 1987, 15(5): 1-8.

Study on Tonstein within Coal Seam C₈ of Upper Permian in Southern Sichuan

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