“About the Stability of the Spectrograph of the 1-M Yale Telescope at Cerro Tololo”. Revista Mexicana de Astronomía y Astrofísica 13, no. 1 (January 1, 1986): 3–7. Accessed December 11, 2025. https://astronomia.unam.mx/journals/rmxaa/article/view/1986rmxaa. 13. 3l.