@article{JSFS_1943__84__161_0,
     author = {Gruner},
     title = {Les statistiques houill\`eres},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {161--169},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {84},
     year = {1943},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1943__84__161_0/}
}