Author: PALMER, ALLISON R.
Title: Morphology and ontogeny of a Lower Cambrian prtychoparioid trilobite from Nevada. [Crassifimbra walcotti]
Description: 1958. Journal of Paleontology 32-1; pp. 154-170, 7 fig. 2 plts. h.t. Orig. extract, new plain wrps. as such very good.

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