00350nam a2200145Ia 4500008004100000020001500041041000800056082001600064100002400080245003200104250000600136260003800142300001500180650000900195210716s1997    xx            000 0 und d  a8170297974  aeng  a005.43 KELS  aKelly Bootle, Stan.  aUnderstanding: unix.bUnix.  a2  aNew DelhibBPB Publicationsc1997  axxviii,587  aUnix