Correspondence between Álvaro Martínez Novillo, deputy director-general of Plastic Arts, and the architect Josep Lluís Sert concerning the installation of Guernica, the preparatory drawings, and the maquette of the pavilion, as well as the invitation to the opening of the exhibition at the Casón del Buen Retiro.

Reference in the source Archive:
(3)97.1 caja 64/2755
Álvaro Martínez Novillo's letter to Josep Lluís Sert, with reply