Author: RIGBY, J.K. & R.H. MAPES
Title: Some Pennsylvanian and permian sponges from southwestern Oklahoma and north-central Texas.
Description: 2000. Brigham Young Univ. Geol. Stud. 45; pp. 25-67, 6 fig./phot. 6 plts. Orig. wrps, stapled extract, 4to.

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