Author: Ellsworth, H.V., 1932.:
Title: Rare-element minerals of Canada. [Econ. Geol.. Ser., 11.]
Description: Ottawa: Department of Miners, Geological Survey, 1932. 8vo, 24.6cm. Pp. vi,272, 1 photogr. plate (depicting alpha-ray electroscope), 8 sketch maps and plans in text, tabs., refs. Paperbound, orig. printed stiff wrappers. Very good.

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