Contains [geologic map], locality data, and illustrations of many Carboniferous fossils.

*Plummer, F. B., and Moore, R. C. (1921) Stratigraphy of the [Pennsylvanian] formations of north-central Texas: Univ. Texas Bull. 2132.

Describes and illustrates many of the more common [Pennsylvanian] fossils of north-central Texas.

*Plummer, F. B., and Scott, Gayle (1937) Upper [Paleozoic] ammonites in Texas: Univ. Texas Bull. 3701, pt. 1.

*Renick, B. C., and Stenzel, H. B. (1931) The lower Claiborne of the Brazos River, Texas: Univ. Texas Bull. 3101, pp. 73-108.

Contains discussion and illustrations of many common [Tertiary] fossils.

Sellards, E. H. (1955) Texas through 250 million years: Museum Notes No. 4, Texas Memorial Museum, Austin.

This little booklet provides a short geologic history of Texas along with a review of oil in Texas.

*Sellards, E. H., Adkins, W. S., and Plummer, F. B. (1933) The geology of Texas, Vol. I, Stratigraphy: Univ. Texas Bull. 3232 (August 22, 1932).

This important publication will give the advanced collector much valuable information on the distribution of the rocks of Texas. Complete with [geologic map].