https://catalogue-scientifique.canada.ca/record=1511823~S6*frc
Rechercher Soviet Union. Gosudarstvennyĭ komitet po narodnomu obrazovani︠i︡u; Rechercher Kharʹkovskiĭ universitet; Rechercher Kharkivsʹkyĭ der︠z︡havnyĭ universytet; Rechercher Kharkivsʹkyĭ der︠z︡havnyĭ universytet imeni O.M. Horʹkoho
KhGU, 1989
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