1.

図書
図書
1. Learning together and alone : cooperative, competitive, and individualistic learning. 4th ed
David W. Johnson, Roger T. Johnson
出版情報: Needham Heights, Mass. : Allyn and Bacon, 1994
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2.

図書
図書
2. Learning together and alone : cooperative, competitive, and individualistic learning. 2nd ed
David W. Johnson, Roger T. Johnson
出版情報: Englewood Cliffs, N.J. : Prentice-Hall, c1987
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