Christensen, Clayton M.
Seeing what?s next : using the theories of innovation to predict industry change
Harvard Business School Press, 2004
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Gregory, R. L.
Eye and brain : the psychology of seeing
McGraw-Hill, 1973
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Philo, Greg
Seeing and believing / Greg Philo
Routledge, 1990
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Frank, Morris
First lady of the seeing eye ,
Kingswood The World's Work 1913
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Berger John
Way of seeing / John Berger
Penguin Books, 1977
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