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Trilobites of the Upper Cambrian Ptychaspid Biomere Wilberens Formation, Central Texas

Susan Ann Longacre

Published: 1970

Total Pages:

Trilobites of the Upper Cambrian Ptychaspid Biomere

Charles Isaac Smith

Published: 1970

Total Pages: 101

Trilobites of the Upper Cambrian Ptychaspid Biomere Wilberns Formation, Central Texas

Susan Ann Longacre

Published: 1970

Total Pages: 70

Trilobities of the Upper Cambrian Ptychaspid Biomere, Wilberns Formation, Central Texas

Susan Ann Longacre

Published: 1970

Total Pages: 70

Trilobites of the Upper Cambrian Ptychaspic Biomere

Charles Isaac Smith

Published: 1969

Total Pages: 54

Trilobites from the Ptychaspid Biomere (Upper Cambrian), Deadwood Formation, Black Hills, South Dakota

Wendy Metcalf

Published: 1994

Total Pages: 158

Upper Franconian and Lower Trempealeauan Cambrian Trilobites and Brachiopods, Wilbers Formation, Central Texas

W. Charles Bell

Published: 1962

Total Pages: 39

Upper Franconian and Lower Trempealeauan Cambrian Trilobites and Brachiopods, Wilberns Formation, Central Texas

Arthur Byron Leonard

Published: 1962

Total Pages: 48

Cambrian Geology and Paleontology ...: Cambrian and Ozarkian trilobites. 1925. (Pub. 2823)

Charles Doolittle Walcott

Published: 1916

Total Pages: 822

Trilobites from a Cambrian Extinction Interval at the Base of the Steptoean Stage, Riley Formation, Central Texas

Madison Layne Armstrong

Published: 2018

Total Pages: 510