Tully, G. E. (1967) “Test-Retest Reliability of the Raven Progressive Matrices Test (Form 1938) and the California Test of Mental Maturity, Level 4 (S-F 1963)”, Florida Journal of Educational Research, 9(1), pp. 67–74. Available at: https://journals.flvc.org/fjer/article/view/133976 (Accessed: 15 April 2024).