Vol. s5-16, Issue 96, 1928December 01, 1928 EDT
The Relative Ages of the Iowan and Illinoian Drift Sheets
The Relative Ages of the Iowan and Illinoian Drift Sheets
George Frederick Kay,
Kay, G. F. (1928). The relative ages of the Iowan and Illinoian drift sheets. American Journal of Science, s5-16(96), 497–518. https://doi.org/10.2475/ajs.s5-16.96.497