Here is why I love the Bertalanffy…..
Ludwig von Bertalanffy, a distinguished biologist, occupies an important position in the intellectual history of the twentieth century. His contributions went beyond biology, and ex- tended to psychology, psychiatry, sociology, cybernetics, history and philosophy. Some of his admirers even believe that von Bertalanffy’s general systems theory could provide a conceptual framework for all these disciplines.
Here are some references!
buy the book here: http://product.half.ebay.com/General-System-Theory-Foundations-Development-Applications-by-Ludwig-Von-Bertalanffy-1969-Paperback-Revised/578858&tg=info
General Systems Theory: The Book