TY  - BOOK
AU  - Helton,Walter L.
TI  - Kentucky's rocks and minerals,
T2  - Kentucky. Geological Survey. Series X. Special publication 9
AV  - QE115 .K4 no. 9
PY  - 1964///
CY  - [Lexington]
PB  - University of Kentucky
KW  - Petrology
KW  - Kentucky
KW  - Mineralogy
N1  - Bibliography: p. 53-55
ER  -