Part I Theory, Part II Ontogenesis, Section I Precursors and Early Stages of Reference and Depiction, Section II Development towards an Autonomous Linguistic Medium for Representation of States of Affairs, Part III The Primordial Handling of the Linguistic Medium in Special States, Part IV Linguistic Characterization of Objects in External versus Inner Speech, Part V Experimental Studies on Symbolization in Nonphonic Media,
Heinz Werner, Bernard Kaplan both Clark University.