Kentucky's rocks and minerals,
Helton, Walter L.
Kentucky's rocks and minerals, by Walter L. Helton. Sketches by Roger B. Potts. - [Lexington] University of Kentucky, 1964. - 55 p. illus., maps. 22 cm. - Kentucky. Geological Survey. Series X. Special publication 9 . - Kentucky. University. Geological Survey. Series X. Special publication 9 .
Bibliography: p. 53-55.
gs 65000359 //r88
Petrology--Kentucky.
Mineralogy--Kentucky.
QE115 / .K4 no. 9
Kentucky's rocks and minerals, by Walter L. Helton. Sketches by Roger B. Potts. - [Lexington] University of Kentucky, 1964. - 55 p. illus., maps. 22 cm. - Kentucky. Geological Survey. Series X. Special publication 9 . - Kentucky. University. Geological Survey. Series X. Special publication 9 .
Bibliography: p. 53-55.
gs 65000359 //r88
Petrology--Kentucky.
Mineralogy--Kentucky.
QE115 / .K4 no. 9