This is the final volume of Heisenberg's Collected Works. It
contains his papers on a (nonlinear) unified theory of
elementary particles, as well as his contribution to
superconductivity and multiparticle production. Especially
interesting is the first group of papers, which is split
intotwo sections dealing with, firstly, the formulation of
the famous nonlinear spinor equation and, secondly,its
applications. Among others the reader willfind a thorough
discussion of Heisenberg's collaboration with W. Pauli on
these matters. Illuminating annotations to the various
sections in this volume have been provided by H. Koppe, R.
Hagedorn and the editors.