Léon Vallas
Léon Vallas ( 17 May 1879 in Roanne – 9 May 1956 in Lyon ) was a 20th-century French musicologist . 
<triplet> Léon Vallas <subj> 17 May 1879 <obj> date of birth <subj> Roanne <obj> place of birth <subj> 9 May 1956 <obj> date of death