“Spanish Stereoscopic Commercial Photography in the 20th Century: ‘El Turismo Práctico’ and ‘Rellev’”, Journal on S&I Media, vol. 2, no. 2, pp. 4–27, Jun. 2019, Accessed: Aug. 13, 2026. Available: https://revistas.ulusofona.pt/index.php/stereo/article/view/6815