Stalin noticed that there were mice in his study and complained to Kalinin about this. Kalinin thought for a moment and suggested, "Why don't you put up a sign reading 'Collective Farm'? Half the mice will die of hunger and the other half will run away."
Reference: http://jokes4us.com/miscellaneousjokes/worldjokes/russiajokes.html
Reference: http://jokes4us.com/miscellaneousjokes/worldjokes/russiajokes.html