IX. On the Conditions of Perpendicularity in a Parallelepipedal System

H. J. S. Smith

Savilian Professor of Geometry in the University of Oxford

Mineralogical Magazine; 1885 v. 6; no. 1; p. 40-48; DOI: 10.1180/minmag.1885.006.1.09
© 1885, The Mineralogical Society
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