Author: Henriques, Å., 1957.:
Title: Optical and physical properties of knebellite. / The alkali contents of kyanite. / Cell dimensions of sphalerite. / Swedish pyrophyllite deposits and the optical properties of pyrophyllite. / The Vickers hardness of zinc blende.
Description: Ark. Miner. Geol., 2(3): pp. 255-297, 8 figs., refs. Plain new wrappers.

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