00270nam a2200109Ia 4500008004100000082001700041100000900058245004200067250000900109260003400118300000800152240913s9999||||xx |||||||||||||| ||und||  a660.092  PER  aNULL 0aPerry`s chemical engineer`s hand book  aNULL  bMc Graw-HillaSingaporec1997  a36p