Zagonetka 700821:
Zagonetka 700821:
Sergei Tativosovich Arzumanyan - AN. Studenetsky
EU/FSM/12 7476 corr ICCF, 1974 Arzumanyan - Studenetsky, corr ICCF 1974
EU/FSM/12 7476 corr ICCF, 1974 Arzumanyan - Studenetsky, corr ICCF 1974