@article{JSFS_1950__91__94_0,
     author = {Bourgeois-Pichat, Jean},
     title = {Charges de la population active},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {94--116},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {91},
     year = {1950},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1950__91__94_0/}
}