@book{Fromm, author = {Fromm, Erich}, title = {Del tener al ser bra P{\´o}stuma, 1), Barcelona (Paid{\´o}s Nueva Biblioteca Erich Fromm 3) 2007 [originated 1974-75]}, number = {translation / {\"U}bersetzung}, language = {es} } @book{Fromm, author = {Fromm, Erich}, title = {Del tener al ser bra P{\´o}stuma, 1), Barcelona (Paid{\´o}s Biblioteca Erich Fromm 10) 2000, 2007 [originated 1974-75]}, number = {translation / {\"U}bersetzung}, language = {es} } @book{Fromm, author = {Fromm, Erich}, title = {Del tener al ser bra P{\´o}stuma, 1), Barcelona (Paid{\´o}s) 1991 [originated 1974-75]}, number = {translation / {\"U}bersetzung}, language = {es} }