Letter from G. Field to W. Pauli. Republication of "Theory of Relativtiy".

Letter from G. Field to W. Pauli. Republication of "The theory of relativity".

Letter from Edizioni scientifiche Einaudi to W. Pauli. Linked to the publication of "The theory of relativity".

Letter from Edizioni scientifiche Einaudi to W. Pauli. Linked to the publication of "The theory of relativity".

Letter from Edizioni scientifiche Einaudi to W. Pauli. Linked to the publication of "The theory of relativity".

Letter from Edizioni scientifiche Einaudi to W. Pauli. Linked to the publication of "The theory of relativity".

Letter from Editore Boringhieri to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.

Letter from Editore Boringhieri to W. Pauli linked to the publication of "The theory of relativity". Problems with copyright.

Letter from Editore Paulo Boringhieri linked to the publication of "The theory of relativity". Problems with copyright.

Comments on calculations and observations made by Källèn on Heisenberg's theory of Hilbert-space I and II.