P. H. Ewert

The Gestalt Theory And The Problem Of Configuration

Bruno Petermann, Meyer Fortes, P. H. Ewert, 1934 .

Part II: The Effect of Verbal Instructions upon the Formation of a Concept

P. Ewert, J. Lambert, P. H. Ewert, 1932 .

Bilateral Transfer in Mirror-Drawing

P. H. Ewert, 1926 .