_:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 "2023-05-21"^^ . _:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 "217585027" . _:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 . _:B6b322500e95ac7e2ea1e92dc55281579 . . _:B6b322500e95ac7e2ea1e92dc55281579 . "Nikola D. Petkov" . "Nikola D." . . . . "Petkov" . "Petkov, Nikola D. (-1947)" . "1947"^^ .