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Koontz, KOONTZ & WEIHRICH. (1990). Essentials of Management. : McGraw Hill Publication Co.
Koontz, KOONTZ and WEIHRICH. 1990. Essentials of Management. : McGraw Hill Publication Co.
Koontz, KOONTZ and WEIHRICH. (1990). Essentials of Management. : McGraw Hill Publication Co.
Koontz, KOONTZ and WEIHRICH. Essentials of Management. : McGraw Hill Publication Co. 1990.
