Author: VAN TUYL, F.M.
Title: The stratigraphy of the Mississippian formations of Iowa.
Description: 1923. Iowa Geol. Surv. Vol. XXX; pp. 33-349, 16 fig./phot. 6 plts. with fossils h.t. Complete issue, including folding out col. plate with geol. map by George F Kay. Orig. cloth, gilt on spine a bit faded, otherwise very good, sm4to.

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