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Joe Obertin joined the group Virginia and West Virginia Fossil Collecting 3 years, 6 months ago
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Joe Obertin joined the group Numinous Cnidaria 3 years, 6 months ago
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Joe Obertin joined the group Eclectic Echinodermata 3 years, 6 months ago
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Joe Obertin joined the group Cincinnatian Collectors 3 years, 6 months ago
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Joe Obertin joined the group Bodacious Brachiopods 3 years, 6 months ago
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Joe Obertin joined the group University of Michigan Museum of Paleontology 3 years, 6 months ago
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Joe Obertin became a registered member 4 years, 6 months ago
4 years, 6 months ago4 years, 6 months ago