00489nam a2200157 a 4500008004100000020002200041245007900063260005300142300003300195650003500228650002100263700002000284003000100304005001700305040000900322                                          a0130962627 (pbk.)10aVirtual reality excursions :bstudy guide /cby Michael Kelly ... [et al.]  aUpper Saddle River, NJ. :bPrentice Hall,c2000.  aiv, 200 p. :bill. ;c28 cm. 1aEarth xEnvironmental aspects.  aVirtual reality.  aKelly, Michael.20230123133431.0  cNUST