University of Iowa studies in psychology.

Editors: 1897- , G. T. W. Patrick and J. A. Gilbert.

Aviation Psychology Program Research Reports

Mode of access: Internet.

Archives of psychology.

Part of illustrative material is folded.

Population psychology : research and educational issues /

Includes bibliographies and index.

Population psychology : research and educational issues /

Includes bibliographies and index.

Wage incentive methods, their selection, installation and operation,

"References for additional cases" at end of chapter 19.

Work incentive program.

Mode of access: Internet.

Outlines of psychology.

Mode of access: Internet.

The principles of psychology.

Mode of access: Internet.

The psychology of childhood,

Thesis (Ph. D.)--Clark university, 1893.