Iapetognathus
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- Conodont Biostratigraphy and Paleoenvironments of the Cardonal
- Pander Society Newsletter
- Early Paleozoic Biochronology of the Great Basin, Western United States
- The Paleozoic Era: Diversification of Plant and Animal Life 7
- Evolution of Oral Apparatuses in the Conodont Chordates
- Global Stratotype Section and Point for Base of the Ordovician System
- The Ordovician Exposed
- University of Copenhagen
- Conodonts from the Andes
- GSSP Table - All Periods
- BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 44,1999
- Permophiles 53-1 Cover.Cdr