TY - BOOK A1 - Knapp, Gerhard P. T1 - Erich Fromm (Köpfe des XX. Jahrhunderts, Vol. 97), Berlin 1982, 95 pp. (Colloquium Verlag). Y1 - 1982 ER - TY - BOOK A1 - Knapp, Gerhard P. T1 - The Art of Living. Erich Fromm's Life and Works (= American University Studies, Series VIII: Psychology, Vol. 13), New York etc. (Peter Lang) 1989, 270 p. Y1 - 1989 ER - TY - BOOK A1 - Knapp, Gerhard P. T1 - The Art of Living. Erich Fromm's Life and Works (Japanese), Tokyo (Shin-hyoron) 1994. Y1 - 1994 ER -