@article{JSFS_1884__25__344_0,
     author = {Keller, O.},
     title = {L'industrie min\'erale en {France} et \`a l'\'etranger},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {344--358},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {25},
     year = {1884},
     language = {fr},
     url = {http://www.numdam.org/item/JSFS_1884__25__344_0/}
}