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008 230718s9999||||xx |||||||||||||| ||und||
082 _a001.642 5
100 _aHELD GILBERT
245 0 _aIBM PC & PC XT USER'S REFERENCE MANUAL
250 _a2
260 _bB P B
_c1987
_aNEW DELHI
300 _a479
999 _c22821
_d22821