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Worlds apart

Mirror Worlds.

by D. Gelernter.Oxford University Press: 1992. Pp. 237. $24.95, £19.95 (hbk); $12.95, £9.95 (pbk). Glimpses of Heaven, Visions of Hell. by B. Sherman P. Judkins. Hodder and Stoughton: 1992. Pp. 224. £12.99 (Pbk). Virtual Worlds. by B. Woolley. Black-well: 1992. Pp. 274. £16.95, $19.95.

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Pickover, C. Worlds apart. Nature 362, 421–422 (1993). https://doi.org/10.1038/362421c0

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