Yŏng-sik Chŏng

1972

• 2007-yŏn EBS sunŭng kangŭi palchŏn pangan yŏn'gu
• EBS sunŭng kangŭi sŏngkwa punsŏk mit kaesŏn pangan yŏn'gu
• EBS sunŭng kangŭi sŏngkwa punsŏk mit kaesŏn pangan yŏn'gu
• Konggun irŏning ch'egye kuch'uk pangan yŏn'gu
• Pangsonggo saibŏ kyoyuk sisŭt'em 2-tan'gye palchŏn pangan yŏn'gu