Vol. s3-40, Issue 238, 1890October 01, 1890 EDT
On the Keokuk Beds at Keokuk, Iowa
On the Keokuk Beds at Keokuk, Iowa
Charles Henry Gordon,
Gordon, C. H. (1890). On the Keokuk beds at Keokuk, Iowa. American Journal of Science, s3-40(238), 295–300. https://doi.org/10.2475/ajs.s3-40.238.295