Easy to Learn Korean : workbook , 2006. – 978-89-7986-658-2, 978-89-7986-655-1 V. 3 . Intermediate– 325 p. : 2426 tg.

Easy to Learn Korean : workbook , 2006. – 978-89-7986-661-2, 978-89-7986-655-1 V. 6 . High Advanced– 297 p. : 2426 tg.

Easy to Learn Korean : workbook , 2006. – 978-89-7986-660-5, 978-89-7986-655-1 V. 5 . Advanced– 373 p. : 2426 tg.

Easy to Learn Korean : workbook , 2006. – 978-89-7986-659-9, 978-89-7986-655-1 V. 4 . High Intermediate– 341 p. : 2426 tg.

Ecological Security in Northeast Asia / ; edited by Miranda A.Schreurs and Dennis Pirages... – Seoul : Yonsei University Press, 1998. - 232 p., index;– (Yonsei Monograph Series on International Studies. ; No.3 . . – 89-7141-463-4 94330, 89-7141-458-8 (set) : 1149 tg.