The Mystery of the Cosmic Helium Abundance 01/29/2019 Types d’événements Cosmo club SpeakerJim Rich Location Bat 141, salle André Berthelot (143) Masque recommandé Visio @132.167.216.81 80 placesVidéo Projecteur Period 01/29/2019 Hoursfrom 1:30 PM at 1:30 PM http://adsabs.harvard.edu/abs/1964Natur.203.1108H (DPhP) Jean-Baptiste MELIN