00340nam a2200157Ia 4500008004100000020000900041035001000050082000800060100001600068245003500084250000600119260003400125300000800159500000900167650000600176210723s9999||||xx |||||||||||||| ||und||  aNULL  a28119  BDAR  aDara, S. S. 0aT. B. In Engineering Chemistry  a-  aN. DelhibSultan Chand & Sons  a526  a3474  a-