Unknowns in the IQ Equation: Environment, Heredity, and Intelligence : . Compiled from the Harvard Educational Review . Reprint Series No. 2. Harvard Educational Review, Cambridge, Mass., 1969. iv, 248 pp., illus. Paper, $4.95.; The IQ Argument . Race, Intelligence and Education. H. J. Eysenck. Library Press, New York, 1971. iv, 156 pp., illus. $5.95.; I.Q. Richard Herrnstein, in the Atlantic , Vol. 228, No. 3, Sept. 1971, pp. 44-64.