. . . . . "New York Debut\r\nEntered from booking ledger and New York Times concert listing and review.\r\n\"THE WEEK'S MUSIC PROGRAMS.\" New York Times (1923-), Sep 27 1964, p. 1. ProQuest. Web. 4 Jan. 2024.\r\nStrongin, Theodore. \"Ok Soo Han of Korea Makes Piano Debut here.\" New York Times (1923-), Sep 30 1964, p. 37. ProQuest. Web. 8 Jan. 2024." . . . . . "Ok Soo Han, Piano" . "1964-09-29T20:30:00"^^ . "solo recital" .