Vol. s4-36, Issue 212, 1913August 01, 1913 EDT
Marked Unconformity Between Carboniferous and Devonian Strata in Upper Mississippi Valley
Marked Unconformity Between Carboniferous and Devonian Strata in Upper Mississippi Valley
Charles Rollin Keyes,
Keyes, C. R. (1913). Marked Unconformity Between Carboniferous and Devonian Strata in Upper Mississippi Valley. American Journal of Science, s4-36(212), 160–164. https://doi.org/10.2475/ajs.s4-36.212.160