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Saffer, Dan.. (2010). Designing for interaction :creating innovative applications and devices (2). Berkeley, CA :: New Riders,.

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Saffer, Dan.. Designing for interaction :creating innovative applications and devices. 2 Berkeley, CA :: New Riders,, 2010. Text.

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Saffer, Dan.. Designing for interaction :creating innovative applications and devices. 2 Berkeley, CA :: New Riders,, 2010. Text.

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Saffer, Dan.. Designing for interaction :creating innovative applications and devices. 2 Berkeley, CA :: New Riders,, 2010. Print.