@article{JSFS_1893__34__20_0,
     author = {Levasseur, E.},
     title = {L'Europe},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {20--25},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {34},
     year = {1893},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1893__34__20_0/}
}