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0018-8670/99/$5.00 © 1999 IBM IBM SYSTEMS JOURNAL, VOL38, NOS 2&3, 1999 FAGAN REPRINTED FROM IBM SYSTEMS JOURNAL, VOL15, NO 3, 1976; © 1976, 1999 258

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Page 1: REPRINTED FROM IBM SYSTEMS JOURNAL, VOL15, NO 3 ...FAGAN 0018-8670/99/$5.00 © 1999 IBM IBM SYSTEMS JOURNAL, VOL38, NOS 2&3, 1999 REPRINTED FROM IBM SYSTEMS JOURNAL, VOL15, NO 3, 1976;

0018-8670/99/$5.00 © 1999 IBM IBM SYSTEMS JOURNAL, VOL38, NOS 2&3, 1999 FAGAN

REPRINTED FROM IBM SYSTEMS JOURNAL, VOL15, NO 3, 1976; © 1976, 1999

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