@article{GDZPPN002453835, title = {Mehrstufige Stichprobenverfahren.}, journal = {Metrika}, volume = {21}, year = {1974}, pages = {7-18}, url = {http://dml.mathdoc.fr/item/GDZPPN002453835} }
STENGER, H. Mehrstufige Stichprobenverfahren.. Metrika, Tome 21 (1974) pp. 7-18. http://gdmltest.u-ga.fr/item/GDZPPN002453835/