Romer, A. S. (1945) [Vertebrate] paleontology, University of Chicago Press, Chicago.
A college-level textbook with numerous illustrations.
Shimer, H. W. (1933) Introduction to the study of fossils, The Macmillan Company, New York.
A relatively simple college-level presentation of plant and animal fossils.
Shimer, H. W., and Shrock, R. R. (1944) Index fossils of North America, John Wiley and Sons, New York.
Comprehensive survey of the more common fossils of North America. Useful to the advanced collector and a most useful aid for [fossil] identification.
Shrock, R. R., and Twenhofel, W. H. (1953) Principles of invertebrate paleontology, McGraw-Hill Book Co., New York.
Useful college-level reference for advanced collectors.
SELECTED REFERENCES ON TEXAS FOSSILS[2]
*Adkins, W. S. (1920) The Weno and Pawpaw formations of the Texas Comanchean: Univ. Texas Bull. 1856.