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Enger, Eldon D.. (2003). Laboratory Manual Concepts in Biology (10th.Ed). New York: McGraw-Hill.

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Enger, Eldon D.. Laboratory Manual Concepts in Biology. 10th.Ed New York: McGraw-Hill, 2003. Text.

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Enger, Eldon D.. Laboratory Manual Concepts in Biology. 10th.Ed New York: McGraw-Hill, 2003. Text.

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Enger, Eldon D.. Laboratory Manual Concepts in Biology. 10th.Ed New York: McGraw-Hill, 2003. Print.