International Tables for Crystallography (2006). Vol. A, ch. 1.4, pp. 711
doi: 10.1107/97809553602060000503 
Chapter 1.4. Graphical symbols for symmetry elements in one, two and three dimensions
Contents

1.4. Graphical symbols for symmetry elements in one, two and three dimensions (pp. 711)  html  pdf  chapter contents 
 1.4.1. Symmetry planes normal to the plane of projection (three dimensions) and symmetry lines in the plane of the figure (two dimensions) (p. 7)  html  pdf 
 1.4.2. Symmetry planes parallel to the plane of projection (p. 7)  html  pdf 
 1.4.3. Symmetry planes inclined to the plane of projection (in cubic space groups of classes and only) (p. 8)  html  pdf 
 1.4.4. Notes on graphical symbols of symmetry planes (p. 8)  html  pdf 
 1.4.5. Symmetry axes normal to the plane of projection and symmetry points in the plane of the figure (p. 9)  html  pdf 
 1.4.6. Symmetry axes parallel to the plane of projection (p. 10)  html  pdf 
 1.4.7. Symmetry axes inclined to the plane of projection (in cubic space groups only) (p. 10)  html  pdf 
 References  html  pdf 