TY - JOUR AU - Vikt. I. Spitsyn AU - R. A. D'yachkova TI - Isolation of weighable quantities of pure piotactinium-231 JO - Doklady Akademii Nauk PY - 1960 SP - 1111 EP - 1114 VL - 134 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1960_134_5_a31/ LA - ru ID - DAN_1960_134_5_a31 ER -