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![Cover for Robert E Slavin · Learning to Cooperate, Cooperating to Learn (Hardcover Book) [1985 edition] (1985)](https://imusic.b-cdn.net/images/item/original/726/9780306417726.jpg?robert-e-slavin-1985-learning-to-cooperate-cooperating-to-learn-hardcover-book&class=scaled&v=1428955790)