00506nam a22001697a 4500999001700000008004100017020001800058050002000076082002800096100002000124245004500144250001100189260003100200300003200231440003400263942003900297  c15630d15630161103b        xxu||||| |||| 00| 0 eng d  a9780787654399  aQ 121 .U18 2001  22nd edaQ 121 .U18 2001  aNagel Robd2001  aU.X.L Encyclopedia of SciencecRob Nagel  a2nd ed  aNew YorkbGale Groupc2001  axxix, 1455pbincludes index  aU.X.L Encyclopedia of Science  2lcccBOOKShQ 121 .U18 2001k26958