The first YERAC conference was held in Meudon, France
“I attended tthe first YERAC conference in Meudon in May 68 (it started one or two days after the first big events in the Quartier Latin!) and I may tell you that the trouble caused by the Islandic volcano (in 2010) is a joke wrt how people could get back home after the conference.”
Michel Guelin (IRAM)