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Obštestvenata sobstvenost pri socializma
Kostov, Ivan, (1985)
Many shades of red : state policy and collective agriculture
Meurs, Mieke E., (1999)
Kolektivizacijata na bălgarskoto selo : (1948 - 1958 g.)
Migev, Vladimir, (1995)
Memorandum of the Ministry of Foreign Affairs of the Democratic People's Republic of Korea
(1962)
The industrial policy of Norway
Haarr, Arne, (1970)
A guide to the known minerals of Turkey
Ryan, Christopher Winfree, (1960)