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Notes and References
This item contains 6 references.
1Rept. Geol. Reconnoissance Indiana, 1862, p. 137.
2Rept. Geol. Surv. Ohio, Pt. I, Rept. Progress in, 1869, p. 21.
3Rept. Geol. Surv. Ohio, Vol. 1, Pt. I, pp. 188, 189.
4Fifth Ann. Rept. Geol. Surv. Indiana made during the year 1873-4, p. 276.
1Fifth Ann. Rept. Geol. Surv. Indiana made during the year 1873-4, p. 276.
2Loc. cit., p. 265.