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Kenneth B. Bork
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Journal Article
Bryozoa (Ectoprocta) of Champlainian age (Middle Ordovician) from northwestern Illinois and adjacent parts of Iowa and Wisconsin; Part 1, Amplexopora, Monotrypella, Hallopora, and Batostoma
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 November 1967
Journal of Paleontology (1967) 41 (6): 1365–1392.