Rediscovering the observations of solar prominences from 1906 to 1957 recorded at the Madrid Astronomical ObservatoryAlejandro Jesús Pérez Aparicio, Víctor Carrasco, María Cruz Gallego and José Manuel VaqueroJ. Space Weather Space Clim., 13 (2023) 5DOI: https://doi.org/10.1051/swsc/2023003