Comments on calculations and observations made by Källèn on Heisenberg's theory of Hilbert-space I and II.Letter
Dyson, Freeman JReflections and calculations on the fundamental field as a 4x4 matrix $\Psi$ and on a Lagrangian invariance against transformationLetter
Gürsey, FezaNote on the Pythagorean oath.Notes
[unknown]Letter related to the publication for the celebration of the 50th anniversary of the theory of the relativity.Letter
Kervaire, MichelLetter from G. Field to W. Pauli. G. Field wrote that the proofs of "The theory of relativity" have gone to the printers.
Field, GeraldLetter from Editore Paulo Boringhieri linked to the publication of "The theory of relativity". Problems with copyright.
Editore BoringhieriLetter from Editore Boringhieri to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.
Editore BoringhieriLetter from Editore Boringhieri to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.
Editore BoringhieriLetter from Il Nuovo Cimento (Redazione) to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.
Il Nuovo CimentoLetter from G. Field to W. Pauli linked to the publication of "The theory of relativity".
Field, Gerald