Foundations of behavioral research :
Kerlinger, Fred N.
Foundations of behavioral research : Educational and psychological inquiry / Fred N. Kerlinger. - New York : Holt, Rinehart and Winston , 1964. - 739 p.
Psychology
Foundations of behavioral research : Educational and psychological inquiry / Fred N. Kerlinger. - New York : Holt, Rinehart and Winston , 1964. - 739 p.
Psychology