1967. No edition stated. 289 pages. No dust jacket. This is an ex-Library book. Red cloth with gilt titles to spine. No. III, about verbal learning etc. Book has been rebound by library, with expected inserts, stamps and inscriptions. Foreword by Theodore Newcomb. Pages have slight foxing, tanning and minor thumbing. A few dog-eared corners. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Gilt is bright.