@phdthesis{THESE_1938__213__1_0,
     author = {Oudin, J.-M.},
     title = {\'Etude sur les divers calendriers},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {213},
     year = {1938},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1938__213__1_0/}
}