International
Tables for
Crystallography
Volume A
Space-group symmetry
Edited by M. I. Aroyo

International Tables for Crystallography (2015). Vol. A, ch. 1.4, p. 58

Figure 1.4.2.7 

M. I. Aroyo,a G. Chapuis,b B. Souvignierd and A. M. Glazerc
[Figure 1.4.2.7]
Figure 1.4.2.7

Symmetry-element diagram (left) and general-position diagram (right) for the space group P2, No. 3 (unique axis b, cell choice 1).