00447nam a2200157Ia 4500 231128s9999 xx 000 0 und d 0-395-52148-3 PHSA PHSA CIR 155.26 R4 1990 Riso, Don Richard Understanding the Enneagram: the practical guide to personality types Boston Houghton Mifflin Company 1990 288 p. BK 1233 1233