@article{MET_1974__21_175639,
     author = {G. RICHTER},
     title = {Kostenoptimale {Stichprobenpl\"ane} f\"ur mehrere qualitative {Merkmale.}},
     journal = {Metrika},
     pages = {155--174},
     publisher = {mathdoc},
     volume = {21},
     year = {1974},
     zbl = {0286.62077},
     url = {http://geodesic.mathdoc.fr/item/MET_1974__21_175639/}
}