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Glenister, Brian F., Bolton, Thomas E., Broadhead, T. W., Eldredge, Niles, Silberling, Norman J., Sweet, Walter C., and Waller, Thomas R. 1977. Fossil Invertebrates - Collections in North American repositories, 1976: a report of the Paleontological Society Ad Hoc Committee on North American Resources in Invertebrate Paleontology (CONARIP). Iowa City, Iowa: University of Iowa Press.