@article{JSFS_1909__50__21_0,
     author = {Hertel},
     title = {Chronique des transports},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {21--24},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {50},
     year = {1909},
     language = {fr},
     url = {http://archive.numdam.org/item/JSFS_1909__50__21_0/}
}