Callavia
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- Smithsonian Miscellaneous Collections
- NATURE 49 Science
- (Trilobita: Olenellina) of the Montezuman Stage (Early Cambrian) in Western Nevada
- (BMNH); Lapworth Museum, School of Earth Scien
- The Trilobite Papers Twenty-Two August 2019
- A Bradoriid and Brachiopod Dominated Shelly Fauna
- 112 JOURNAL of PALEONTOLOGY, V. 75, NO. 1, 2001 Types.—The
- A Revised Correlation of the Cambrian Rocks in the British Isles
- Darwin's Lost World. the Hidden History of Animal Life
- The Cambrian of the Iberian Peninsula: an Overview Geologica Acta: an International Earth Science Journal, Vol
- The Trilobite Papers Twenty-Three February 2020
- United States Department of the Interior Geological Survey Short Papers For
- Trilobite Segmentation
- LIEBERMAN—CLADISTICS of OLENELLID TRILOBITES 111 Elliptocephala Bicensis (Walcott, 1910) Was Originally Treated As a Species O
- Ar Ticle in Press