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Poulter, A.: Building a browsable virtual library (1994)
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Newby, G.B.: Virtual reality (1993)
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Oppenheim, C.: ¬The applications of virtual reality : pt.1.2 (1993)
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Müller, H.F.J.: Concept-dynamics and the mind-brain question (2001)
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Romkey, J.: Whither cyberspace? (1991)
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