Robitnyči fakulʹtety v USRR (1920-ti-počatok 30-ch rr) stvorennja ta funkcionalʹna dijalʹnistʹ = Workers' faculties in the Ukrainian SSR (1920s-early 30's): creation and functional activity - Kryštalʹ, Svitlana Petrivna (Charkivsʹkyj nacionalʹnyj universytet imeni V.N. Karazina, 2019)