Early Cenozoic Paleontology and Statigraphy of the Bighorn Basin, Wyoming (Papers on Paleontology, No 24)
Ann Arbor: University of Michigan, 1980. 146 pages. 8 by 10 inches. ISBN: 9789992222737.
First edition (first printing). Light bumps to corners else a fine copy in wrappers (paperback). From the Harvard office library of the paleontologist and leading advocate for evolution, Stephen Jay Gould.