00320nam a2200121Ia 4500082002100000100000700021245007500028260002700103300002100130490003700151500000500188700000500193  aRb518.5425 M426  ad  aMathematica; a systems for doing mathematics by computer version 2.2b  bWolfram Researchc1993  aiii, 186p. Index  aUser's guide for the x front end  a  a