Note on the Determination of the Optic Axial Angle of a Crystal in Thin-Section by the Mallard-Becke Method

Harvey Collingridge

Mineralogical Magazine; July 1913 v. 16; no. 77; p. 348-351; DOI: 10.1180/minmag.1913.016.77.08
© 1913, The Mineralogical Society
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