00350nam a2200121Ia 4500008004100000020001800041100002100059245004300080250001300123260003900136650003000175700002300205190829s9999||||xx |||||||||||||| ||und||  a9789813091037  aGroff, James R.  0aUnderstanding Unix: A Conceptual Guide  a2ND ED.   bTech PublicationsaSingaporec1988  aComputer Program Language  aWeinberg, Paul N.