The geological reconnaissance in the northwestern part of Kansu was undertaken during the five months from the end of June to the beginning of December, 1923, The area covered is along the graben trough
The geological reconnaissance in the northwestern part of Kansu was undertaken during the five months from the end of June to the beginning of December, 1923, The area covered is along the graben trough
P. L. YUAN.1925. CARBONIFEROUS STRATIGRAPHY OF NORTHWESTERN KANSU.[J].地质学报,(1).
P. L. YUAN.1925.[J]. Acta Geologica Sinica,(1).
