Martínez-Fortún Medrano E. Español Correspondence in the process of identifying the photographs of León Martínez-Fortún Erlés in the photographic collection of the Martínez-Fortún Fonds of the Municipal Archive of Valladolid. Rev. gen. inf. doc. [Internet]. 2025 Jul. 15 [cited 2026 Jul. 10];35(1):63-80. Available from: https://revistas.ucm.es/index.php/RGID/article/view/98938