@article{JSFS_1873__14__277_0,
     author = {Winckler},
     title = {Coup d'{\oe}il g\'en\'eral sur le {Zollverein}},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {277--280},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {14},
     year = {1873},
     language = {fr},
     url = {http://archive.numdam.org/item/JSFS_1873__14__277_0/}
}