Book Reviews : Stanley A. Mulaik. The Foundations of Factor Analysis. New York: McGraw-Hill,1972. Pp. xvi + 453. $14.95.*

Guilford, J. P. Fundamental statistics in psychology and education. New York: McGraw-Hill, 1965.

Pinneau, S. R. and Newhouse, A. Measures of invariance and comparability—in factor analysis for fixed variables. Psychometrika, 1964, 29, 271-281.