1.K. Sambamurthy, Ashutosh Kar-Pharmaceutical Biotechnology

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2.Pharmaceutical Biotechnology Drug Discovery and Clinical Applications

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3. Microbiology_Ashutosh kar

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4.Michael t. Pelczar

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5.Biotechnology

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6.  Textbook of Microbiology and Immunology

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7.lippincotts Micobiology

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