Vol. s5-22, Issue 131, 1931November 01, 1931 EDT
Age of the Black Shale in South-Central Kentucky
Age of the Black Shale in South-Central Kentucky
Thomas Edmund Savage, Arle Herbert Sutton,
Savage, T. E., & Sutton, A. H. (1931). Age of the black shale in south-central Kentucky. American Journal of Science, s5-22(131), 441–448. https://doi.org/10.2475/ajs.s5-22.131.441