Pennsylvanian trilobites of Ohio (Report of investigations)
[rk. 2]
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Pennsylvanian Trilobites of Ohio Report of Investigations No. 142
[rk. 3]
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Ordovician Isotelus Gigas Trilobite Fossil - 42"W x 28"H - Peel and Stick Wall Decal by Wallmonkeys
[rk. 4]
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Lower Middle Devonian Phacopid Trilobites from Michigan, Southwestern Ontario, and The Ohio Valley, 1954, Contributions from the Museum of Paleontology, Volume 11, Number 11 : pages 201-221 with 4 plates.
Lower Middle Devonian Proetid Trilobites From Michigan, Southwestern Ontario, and Northern Ohio, 1953, Contributions for the Museum of Paleontology University of Michigan, Volume 11, Number 3 : pages 11-31 with 4 figures.
Two new species of trilobites from the Middle Devonian silica shale of northwestern Ohio, (Contributions from the Museum of Paleontology, University of Michigan)