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Ericksen, S. C. (1942). J. genet. Psychol.60, 177.Google Scholar
Harlow, H. F. (1932). J. genet. Psychol.41, 430.Google Scholar
Harris, L. J., Clay, J., Hargreaves, F. J. & Ward, A. (1933). Proc. roy. Soc. B, 113, 161.Google Scholar
Richter, C. P. (1940). Quoted by Munn, N. L. (1950). In Handbook of Psychological Research on the Rat, p. 63. Cambridge, Mass.: Riverside Press.Google Scholar
Richter, C. P., Holt, L. E.Jr. & Barelare, B. (1937). Science, 86, 354.CrossRefGoogle Scholar