@misc{Fromm1968, author = {Erich Fromm}, title = {Introduction, in 1968b: Erich Fromm and Ram{\´o}n Xirau (Eds.): The Nature of Man. Readings selected, edited and furnished with an introduction by Erich Fromm and Ram{\´o}n Xirau, New York (Macmillan) 1968, pp. 3-24.}, type = {foreword}, year = {1968}, }