TY JOUR TI BREAKTHROUGH OF THE ENERGY BLOCKADE OF BESIEGED LENINGRAD (1941–1942) KW blockade KW Leningrad KW electricity KW feat KW energy blockade KW breakthrough JO Psychological and pedagogical problems of human and social security AU Zakharova, T.N. AU Pereprosova, K.N. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia