Programmed instruction / by D. Mackenzie Davey and P. McDonnell.
By: Davey, D. Mackenzie (Douglas Mackenzie) Davey, D. Mackenzie (Douglas Mackenzie).
Contributor(s): McDonnell, P. (Patricia) McDonnell, P. (Patricia).
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First published in 1964.
Bibliography: p. 52-54.
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