"This is the first volume to appear under the joint editorship of J.P. Hirth and F.R.N. Nabarro. While Volume 11 concentrated on the single topic of dislocations and work hardening, the present volume spreads over the whole range of the study of dislocations from the application by Kléman and his colleagues of homotopy theory to classifying the line and point defects of mesomorphic phases to Chaudhri's account of the experimental observa ..."
"to classify defects in quasicrystals, which can be considered as 3D boundaries of
6D hypercubic crystals [31]. The calculation of the groups ... for these systems. By
methods of differential topology it is proved that in 3D topological defects of this ..."