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Subjects
Hungary -- History -- Revolution, 1956 -- Refugees
24
Hungary -- Emigration and immigration -- Interviews
19
Hungary -- History -- 1945-1989 -- Sources
19
Hungary -- History -- 1956 -1962 -- Sources
5
Engineers
2
Intelligence service
2
Atomic bomb
1
Conservation of natural resources
1
Cooperative societies
1
Democracy
1
Engineering
1
Environmental protection
1
Equality
1
Espionage
1
Espionage, Soviet
1
Export controls
1
Frigates
1
Industrialization
1
Information society
1
Information technology
1