TY - JOUR AU - G. V. Spivak AU - I. A. Pryamkova AU - V. N. Lepeshinskaya TI - Electron optical observation of ``spot fields'' on emitting surfaces JO - Doklady Akademii Nauk PY - 1960 SP - 751 EP - 754 VL - 130 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1960_130_4_a8/ LA - ru ID - DAN_1960_130_4_a8 ER -