International
Tables for Crystallography Volume E Subperiodic groups Edited by V. Kopský and D. B. Litvin © International Union of Crystallography 2010 
International Tables for Crystallography (2010). Vol. E, ch. 1.2, pp. 2224
Section 1.2.17.2. Rod groups^{a}Freelance research scientist, Bajkalská 1170/28, 100 00 Prague 10, Czech Republic, and ^{b}Department of Physics, The Eberly College of Science, Penn State – Berks Campus, The Pennsylvania State University, PO Box 7009, Reading, PA 19610–6009, USA 
A list of sets of symbols for the rod groups is given in Table 1.2.17.2. The information provided in the columns of this table is as follows:

Sets of symbols which are of a nonHermann–Mauguin (international) type are the set of symbols in column 6 and the Nigglitype set of symbols in column 9. The set of symbols in column 8 does not use the lowercase script letter , as does IT A (2005), to denote a onedimensional lattice. The order of the characters indicating symmetry elements in the set of symbols in column 7 does not follow the sequence of symmetry directions used for threedimensional space groups. The set of symbols in column 4 have the characters indicating symmetry elements along nonlattice directions enclosed in parentheses, and do not use a lowercase script letter to denote the onedimensional lattice. Lastly, the set of symbols in column 4, without the parentheses and with the onedimensional lattice denoted by a lowercase script , are identical with the symbols in Part 3 , or in some cases are the second setting of rod groups whose symbols are given in Part 3 . These secondsetting symbols are included in the symmetry diagrams of the rod groups.
References
International Tables for Crystallography (2005). Vol. A, SpaceGroup Symmetry, edited by Th. Hahn. Heidelberg: Springer. [Previous editions: 1983, 1987, 1992, 1995 and 2002. Abbreviated as IT A (2005).]Bohm, J. & DornbergerSchiff, K. (1966). The nomenclature of crystallographic symmetry groups. Acta Cryst. 21, 1004–1007.
Bohm, J. & DornbergerSchiff, K. (1967). Geometrical symbols for all crystallographic symmetry groups up to three dimensions. Acta Cryst. 23, 913–933.
Chapuis, G. (1966). Anwendung der Raumgruppenmatrizen auf die ein und zweifach periodischen Symmetriegruppen in drei Dimensionen. Diplomarbeit, University of Zurich, Switzerland.
Opechowski, W. (1986). Crystallographic and Metacrystallographic Groups. Amsterdam: North Holland.
Shubnikov, A. V. & Koptsik, V. A. (1974). Symmetry in Science and Art. New York: Plenum.