00793cam a22002531 4500 gs 63000328 DLC 20260227111413.0 780711s1963 aluab b 000 0 eng gs 63000328 (OCoLC)4043463 DLC MiDW DLC premarc QE471 .C57 Clarke, Otis M. Residual clays of the Piedmont province in Alabama. University, Ala., 1963. 60 p. illus., maps (1 fold. col. in pocket) 23 cm. Geological Survey of Alabama. Circular 20-A Prepared in cooperation with the Bureau of Mines, U. S. Dept. of the Interior. Bibliography: p. 59-60. Clay Alabama. Geology Alabama. 29751 29751