Sergei Kalistratovich Romanovskiǐ

Mezhdunarodnye kul'turnye i nauchnye sviazi SSSR
Mezhdunarodnye kulʹturnye i nauchnye svi͡a︡zi SSSR
Mezhdunarodnȳe kul'turnȳe i nauchnȳe svyazi SSSR