@article{RSA_1961__9_4_97_0,
     author = {Ferignac, P.},
     title = {Des surprises d'un \'echantillonnage},
     journal = {Revue de Statistique Appliqu\'ee},
     pages = {97--100},
     publisher = {Soci\'et\'e de Statistique de France},
     volume = {9},
     number = {4},
     year = {1961},
     language = {fr},
     url = {http://www.numdam.org/item/RSA_1961__9_4_97_0/}
}