. "박용구" . . "Yong-Gu" . "Yong-ku" . "朴容九" . . "朴容九" . "박용구" . "박용구" . . "1923" . "Pak"@en . "Yŏng-gu Pak" . "Yong-gu"@en . "Yong-Gu Pak" . "朴 容九" . "朴容九" . "Yŏng-gu" . "Yong-ku Pak" . "Yong-gu Pak"@en . . .