@article{Bertalanffy, author = {Bertalanffy, Ludwig von}, title = {Comments on Aggression, presented at the 1956 Winter Meeting of the American Psychoanalytic Association, New York City.}, language = {en} } @article{Bertalanffy, author = {Bertalanffy, Ludwig von}, title = {A Biologist Looks at Human Nature}, series = {Scientific Monthly (Jan. 1956), pp. 33-41.}, journal = {Scientific Monthly (Jan. 1956), pp. 33-41.}, language = {en} }