Author Зиновьев Г.Е. Description Zinoviev, G.E. Proletarian feast of the 1st of May. - [Petrograd]: Izd. Petrograd. council slave. and the Red Army .. dep., 1918. -16 with .. - . Source of the electronic copy: PB Publisher Изд. Петрогр. совета раб. и красноарм.. деп.