@article{JSFS_1913__54__239_0,
     author = {Babson, Roger-W.},
     title = {L'\'etablissement et l'application des indices nationaux {Babson}},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {239--249},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {54},
     year = {1913},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1913__54__239_0/}
}