Permian brachiopods of West Texas, IV
Cooper, G.A., Grant, R.E.
Permian brachiopods of West Texas, IV - Washington 1976 - 1924-2607 p. - Mithsonian Contributions to Paleobiology. No. 21 .
Permian brachiopods of West Texas, IV - Washington 1976 - 1924-2607 p. - Mithsonian Contributions to Paleobiology. No. 21 .