Rabochiĭ klass v so︠t︡sialʹno-politicheskoĭ sisteme KNR - Rum︠i︡an︠t︡sev, Alekseĭ Matveevich; Gelʹbras, V. G. (Izd-vo "Nauka," Glav. red. vostochnoĭ lit-ry, 1981)