Model No. 699 FA: 25
Description: The plane analoga of the Schoenfliess space groups, 1. enlarged photography of the journal for crystallography, vol. 60, p. 281 (1924 (699), 2. examples for the 17 plane groups with information about the symmetry elements, executed by Muss Dr. Seynsche (700)
RE: Speiser Gruppentheorie 2. Aufl. p. 77; Zeitschr. für Kristallographie Bd. 60, p. 278 (Polya auch in MD, p.) u.p. 283 (P. Niggli) 1924 (auch in M4 p. 469) Category: Divisions of regions
RU: B III 13,14