A Practical guide to behavioral research :
SOMMER, Robert
A Practical guide to behavioral research : Tools and techniques Robert Sommer and Barbara B. Sommer. - New York Oxford University Press 1980 - 256 p.
Includes bibliographical references and index
0195026918 9780195026917
Behavior--Research--Methods
A Practical guide to behavioral research : Tools and techniques Robert Sommer and Barbara B. Sommer. - New York Oxford University Press 1980 - 256 p.
Includes bibliographical references and index
0195026918 9780195026917
Behavior--Research--Methods