hardcover. 6 volumes. 8vo, green cloth; vols. 1, 2, 3, & 4 with chipped dust wrappers. Ownership signature on front flyleaf of each volume, 1959, 1959, 1959, 1962, 1963, 1963. Very good. Study I: Conceptual and Systematic [in 3 volumes]: Volume 1: Sensory, Perceptual, and Physiological Formulations; Volume 2: General Systematic Formulations, Learning, and Special Processes; Volume 3: Formulations of the Person and the Social Context. Study II: Empirical Substructure and Relations with Other Sciences [in 3 volumes]: Volume 4: Biologically Oriented Fields; Their Place in Psychology and in Biological Science; Volume 5: The Process Areas and Some Applied Fields; Their Place in Psychology and in Science; Volume 6: Investigations of Man as Socius; Their Place in Psychology and the Social Sciences.