The Use of the Gnomonic Projection in the Determination of the Optical Indicatrix of Crystals

N. Joel

Birkbeck College Research Laboratory, London.

Mineralogical Magazine; June 1951 v. 29; no. 213; p. 602-608; DOI: 10.1180/minmag.1951.029.213.06
© 1951, The Mineralogical Society
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