共 3 条
[1]
Sedimentary and volcanic processes in the formation of high allumina clay. V. T. Allen. Economic Geology . 1946
[2]
High allumina clays of Pennsylvamia. R. H. Foose. . 1944
[3]
Non metallic minerals. R. B. Ladoo,W. M. Myers. . 1951