DEFINITION OF SYMMETRY ELEMENTS IN SPACE-GROUPS AND POINT GROUPS - REPORT OF THE INTERNATIONAL UNION OF CRYSTALLOGRAPHY AD-HOC COMMITTEE ON THE NOMENCLATURE OF SYMMETRY (ACTA CRYSTALLOGRAPHICA SECTION A, 1989)

(untitled) - Dewolff, P; Billiet, Y; Donnay, J; Fischer, W; Galiulin, R; Glazer, A; Senechal, M; Shoemaker, D; Wondratschek, H; Hahn, T; Wilson, A; Abrahams, S