일의 능률을 올리는 집중기술
Häftad bok.
Mycket gott skick. [Format: 14,5 x 21,5 cm. Language: Korean.] Published by 영진닷컴 2004. 219 (1) pages in publishers coated softcover with flaps. Richly illustrated - the contents of the book has the appearance of a comic strip book. Translated from Japanese by Kang Jinhee.