Permo-Carboniferous vertebrates from New Mexico /
Case, E. C.(Ermine Cowles),1871-
Williston, Samuel Wendell,1851-1918.
Mehl, Maurice G.(Maurice Goldsmith),1887-1966.
Washington, D.C. : Carnegie Institution of Washington,
1913.
Vertebrates, Fossil
Paleontology
Paleontology
Animals, Fossil