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	1		Tardugno, Anthony F. IT services : costs, metrics, benchmarking and marketing / Anthony F. Tardugno, Thomas R. DiPasquale, Robert E. Matthews . — Upper Saddle River : Prentice Hall, [2000]. — XXVII, 201 p. ; 24 cm. — ( Enterprise computing)
	2		Tardugno, Anthony F. IT services : costs, metrics, benchmarking and marketing / Anthony F. Tardugno, Thomas R. DiPasquale, Robert E. Matthews . — Upper Saddle River : Prentice Hall, [2000]. — XXVII, 201 p. ; 24 cm. — ( Enterprise computing)