There are 2 matches

Collection Authorizer Collection name Reference
10391S. Holland Harding Formation Trilobites Caradoc - Ordovician 4-5 - Colorado Frederickson and Pollack (1952)
170686M. Hopkins Harding Formation Trilobites B Caradoc - Ordovician 4-5 - Colorado Frederickson and Pollack (1952)

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