Book Reviews : Gilbert Sax. Empirical Foundations of Educational Research. Englewood Cliffs,N. J.: Prentice-Hall,1968. Pp. xiii + 443. $6.95

Campbell, D. T. and Stanley, J. C. Experimental and Quasi-Experimental Designs for Research on Teaching. In Handbook of Research on Teaching, N. L. Gage (Ed.). Chicago: Rand McNally & Company, 1963. Pp. 171-246.

Hebb, D. O. Education for Research. Canadian Federation News, 1966, 8, 53-57.

Kerlinger, F. N. Foundations of Behavioral Research. New York: Holt, Rinehart, and Winston, 1967.