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The simplest way to navigate this site is to visit the following page:
Table of Formal and Descriptivists Ontologists (PDF - from Bernard Bolzano to present time)
Ontologists of the 19th and 20th Centuries (a selection of critical judgments about some of the greatest philosophers of the recent past)
Living Ontologists (a list of authors with an interest in ontology, with synthetic Bibliographies)
For an introduction to the his work see: Ludwig von Bertalanffy (from the International Society for the Systems Sciences) A complete bibliography of his scientific writings (about
280 items) can be found in: William Gray and Nicholas D. Rizzo (eds.) - Unity through diversity: a Festschrift for Ludwig von Bertalanffy - New York, Gordon and Breach Science publishers, 1973, (2
v., XXII, 1141 pages).