@book{Portmann, author = {Portmann, Adolf}, title = {New paths in biology, New York, Evanston and London (Harper \& Row) 1964.}, language = {en} } @article{Portmann, author = {Portmann, Adolf}, title = {Naturauffassung und Menschenbild}, series = {Welterleben und Weltwissen, M{\"u}nchen 1964, pp. 51-66.}, journal = {Welterleben und Weltwissen, M{\"u}nchen 1964, pp. 51-66.}, language = {de} }