TY - JOUR AU - Ya. L. Alpert AU - F. F. Dobryakova AU - E. F. Chudesenko AU - B. S. Shapiro TI - On the results of the electron concentration determinations in the external region of the ionosphere made on the basis JO - Doklady Akademii Nauk PY - 1958 SP - 743 EP - 746 VL - 120 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1958_120_4_a14/ LA - ru ID - DAN_1958_120_4_a14 ER -