Grant, R. E., 1962, Trilobite distribution, upper Franconia Formation (Upper Cambrian), southeastern Minnesota: Journal of Paleontology, v. 36, p. 965- 998.

Lively, R. S., 1983, Late Quaternary U-series speleothem record from southeastern Minnesota: Geology, v. 11, p. 259-262.

[Return to A Keyword-Indexed Origins Bibliography]

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