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SOFTWARE\(emPRACTICE AND EXPERIENCE, VOL. \\*(VN(\\*(NU), \\n(P<-\\n(P> (\\*(MO 20\\n(yr)
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REFERENCES
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Bell Labs, 600 Mountain Avenue, Murray Hill, New Jersey 07974, U. S. A.
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Bell Labs, Holmdel, New Jersey 07733, U. S. A.
..
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Bell Labs, Whippany, New Jersey 07981, U. S. A.
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