TY - JOUR AU - A. Linder TI - Statistical Methods in Medical Research - Armitage, P. JO - Metrika PY - 1972 SP - 238 EP - 238 VL - 19 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MET_1972__19_175563/ ID - MET_1972__19_175563 ER -