An unshakable mind : how to overcome life's difficulties / Ryuho Okawa. - New York : Lantern Books, c2003. - x, 119 p. ; 22 cm. ISBN: 1930051778 LCCN: 2002152401 Subjects--Topical Terms: Spiritual lifeMaturation (Psychology)Self-confidence LC Class. No.: BQ5612 / .O53 2002 Dewey Class. No.: 820.44 / OKU 2012