TY  - JOUR
AU  - P. E. Krasnushkin
TI  - The propagation of long and ultra-long radio waves about the earth in the lower ($C$, $D$, and $E$) layers 

JO  - Doklady Akademii Nauk
PY  - 1961
SP  - 67
EP  - 70
VL  - 139
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1961_139_1_a17/
LA  - ru
ID  - DAN_1961_139_1_a17
ER  -