Author: Twenhofel, W.H., & Shrock, R.R., 1935.:
Title: Invertebrate paleontology. First edition, fifth impression.
Description: ew York: McGraw-Hill. Pp. xvi,511, 174 figs., refs., index. Orig. cloth. Backstrip a bit rubbed, traces of label and stamp on front endpaper, good otherwise.

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