Case, E.C. & S.W. Williston & M.G. Mehl; The Permo-Carboniferous Vertebrates From New Mexico & The Permo-Carboniferous Red Beds of North America and their vertebrate fauna. Carnegie Institution of Washington Publication 181, Washington, DC: Carnegie Institution, 1913. Quarto, pp. 81, 51 illustrations. & Carnegie Institution of Washington Publication, 207, Washington, DC, 1915. Quarto, pp. 176, folded colored geological map, 24 plates, 50 illustrations.
The two works are complete and in a matching half calf and cloth with gilt spine titles. Light wear with restoration to the spines. The bindings are tight. X-lib. Paleontology library, Calif. Inst. Technology with their stamp and blind stamp. In very good condition.
The authors provide a detailed description of the stratigraphy and vertebrate fossils that had been identified within the Permo_Carboniferous strata of parts of North America.