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1
Introduction to environmental engineering / Mackenzie L. Davis, David A. Cornwell.
New York : McGraw-Hill, Inc., 1991.
822 p. : ill ; 23 cm.
2
Introduction to management : custom publication / Palgrave Macmillan.
New York : Palgrave Macmillan, 2012
319 p. : ill. ; 25 cm.