Forces in community development.

National Training Laboratories (National Education Association of the United States)
Washington, [publisher not identified], 1961.

Handbook of staff development and human relations training: Materials developed for use in Africa.

Nylen, Donald.
Copenhagen : The European Institute for Trans-National Studies in Group and Organizational Development; Washington : National Training Laboratories, National Education Association of the United States, [1967]
(Revised and expanded ed.) By Donald Nylen, J. Robert Mitchell and Anthony Stout.

Human forces in teaching and learning.

National Training Laboratories (National Education Association of the United States)
Washington, [publisher not identified], 1961.

The Journal of applied behavioral science.

[Greenwich, Conn., etc.] : JAI Press. [etc.]