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Bittel, Lester R.. (). What Every Supervisor Should Know. . New York: McGraw Hill.

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Bittel, Lester R.. What Every Supervisor Should Know.. New York: McGraw Hill, . Text.

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Bittel, Lester R.. What Every Supervisor Should Know.. New York: McGraw Hill, . Text.

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Bittel, Lester R.. What Every Supervisor Should Know.. New York: McGraw Hill, . Print.