TY  JOUR
TI  From teaching experience. XIX. The 85th anniversary of the textbook “Crystallography” (Popov, Shafranovsky, 1941)
KW  species (point groups)
KW  classes and lines (families) of symmetry
KW  hierarchies of species
KW  classes and lines; limiting symmetry groups
JO  Vestnik of geosciences
AU  Voytehovskiy, Y.L.
PY  2026
IS  0
PB  FSBI FIC &quot;Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences&quot;