The age variable in psychological research
By: Joachim F. Wohlwill
Series: RB-69-40; Research bulletin (Educational Testing Service) -- RB-69-40
Publisher: Educational Testing Service
Published: 1969
Place of publication: Princeton, N.J
Language: eng
Number of pages: 44
Subjects: Psychology; Research
Notes: This bulletin is a draft for interoffice circulation. It is automatically superseded upon formal publication of the material.--T.p.

"May 1969."

Includes bibliographical references (leaves 35-40).