Author: TROWBRIDGE, A.C.
Title: A geologic reconnaissance in the Gulf coastal plain of Texas near the Rio Grande.
Description: 1923. US Geological Survey Professional Paper 131-D; pp. 85-115, 1 fold-out plt. with col. geol. map, 5 plts. h.t. with Eocene molluscs. Orig. wrps. very good, 4to.

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