00327nam a2200097Ia 4500008004100000082001300041100005800054245006900112260004000181300000800221140113s9999 xx 000 0 und d a311 L0 a"Sukhatme, Pandurang V. and Sukhatme, Balakrishna.V." aSampling theory of surveys with applications 2nd revised edition a1970bAsia Publishing HousecBombay a452