00293nam a2200121 a 450000500170000008200170001710000190003424500240005326000270007730000180010470000250012270000240014720251203090500.0  a321.09,bser  aSertsova, Anna  aWhat is revolution?  aMoscow: Progressc1986  a191p.c18 cm.  aShishkina, Valentina  aYakovleva, Lyudmila