Photographic Search for the Minor Planet Sappho […], 14th January 1887, exposure 60 minutes (titre original)

Roberts, Isaac (1829-1904), “Photographic Search for the Minor Planet Sappho […], 14th January 1887, exposure 60 minutes (titre original),” Bibliothèque numérique - Observatoire de Paris, consulté le 5 mai 2024, https://bibnum.obspm.fr/ark:/11287/2SBLQ.