@misc{JSFS_1920__61__224_0,
     title = {Rapport de la {\guillemotleft} {Pr\'eservatrice} {\guillemotright}},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {224--227},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {61},
     year = {1920},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1920__61__224_0/}
}