Elements of a Two-Process Theory of Learning.
By J. A. Gray. Pp. x+423. (Academic: London, New York and San Francisco, 1975.) £6.60; $16.50.
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Halliday, M. Learning theory. Nature 260, 467 (1976). https://doi.org/10.1038/260467b0
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DOI: https://doi.org/10.1038/260467b0