On Face- and Zone-Symbols Referred to Hexagonal Axes

Max H. Hey

Assistant-Keeper in the Mineral Department of the British Museum of Natural History.

Mineralogical Magazine; June 1930 v. 22; no. 129; p. 283-290; DOI: 10.1180/minmag.1930.022.129.04
© 1930, The Mineralogical Society
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