. "Hyŏn-su"@en . "鄭賢壽" . "Chŏng"@en . "정현수" . "정현수" . "정 현수" . "鄭 賢壽" . "鄭賢壽" . "정 현수" . "鄭賢壽" . "鄭 賢壽" . "정 현수" . . "Hyŏn-su Chŏng"@en . "정현수" . . . "鄭 賢壽" . . .