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Gayler, G.For the mass operation of the POPR seal: (materials for readers' conferences and the Rabokor MOPR circles, etc.): from adj.Art.I. Gelisa: How to organize a reader conference.-Moscow: Publishing House of the Central Committee of the MOPR USSR, 1932. -40 p.: table .. -Bibliogr.in the text.- Ex.: Without region..I. Helis, and..1.State (collection).Electronic copy source: PBOriginal storage location: BAP