Tolman, 1988
Tolman, C. W. (1988). The basic vocabulary of activity theory. Activity Theory, 1, 14-20.
http://www.comnet.ca/%7Epballan/AT2.htm
Tolman, C. W. (1988). The basic vocabulary of activity theory. Activity Theory, 1, 14-20.
http://www.comnet.ca/%7Epballan/AT2.htm
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