TY - JOUR AU - S. Zubrzycki TI - Remarks on random stratified and systematic sampling in a plane JO - Colloquium Mathematicum PY - 1958 SP - 251 EP - 264 VL - 6 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-6-1-251-264/ DO - 10.4064/cm-6-1-251-264 LA - en ID - 10_4064_cm_6_1_251_264 ER -