Lukoff, Fred. An introductory course in Korean : Book 3 / by Fred Lukoff. - 2nd rev. & ex. ed. - Korea : Yonsei University Press, 1993. - 224 p. ; 28 cm. ISBN: 89-7141-362-X Subjects--Geographic Terms: Korean language --Textbooks for foreign speakers. Dewey Class. No.: 495.78 / I8