Report on the phosphate rocks of central Kentucky. - Phalen, William Clifton, 1877-1949.; Kentucky. Geological survey, 1912-1918. (Frankfort, Ky. [State Journal Company, Printer], 1915)
At head of title: Kentucky. Geological survey ... in co-operation with the United States Geological survey.
Half-title: The central Kentucky phosphate field, by W.C. Phalen.
"Bibliography of publications relating to phosphate rock": p. 78-80.
Keywords: Phosphates -- Kentucky