Brief 1: Grete Hermann an Paul A. M. Dirac (9.11.1933)

Brief 7: Grete Hermann an Werner Heisenberg (9.2.1934)

Paul Adrien Maurice Dirac (1902?1984)

Paul Dirac on his eightieth birthday

Paul Dirac revisited.

Paul Dirac — Tying Things Together

Paul Dirac and The Principles of Quantum Mechanics