Evaluating clay resources from Clay County, Ga., for structural clay products /
by K.J. Liles and H. Heystek.
- Washington : Dept. of the Interior, Bureau of Mines, 1980.
- 28 p. : ill.
- Report of investigations ; 8421 .
- United States. Bureau of Mines. Report of investigations ; 8421 .
- Report of investigations (United States. Bureau of Mines) ; 8421. .