한국청소년개발원 2023-05-10T10:42:58Z 2023-05-10T10:42:58Z 1993 Made available in DSpace on 2023-05-10T10:42:58Z (KST). No. of bitstreams: 0 000000000937 한국청소년개발원 청소년 가치관 변화의 국제동향 Conference