Evaluate websites by identifying currency, authority, credibility, and relevancy so to identify and retrieve websites that are suitable for a research assignment.
Bergey's manual® of systematic bacteriology : Volume 2: The proteobacteria, part B: The gammaproteobacteria by 
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Bergey's Manual of Systematic Bacteriology : Volume 3: The Firmicutes
Bergey's Manual of Determinative Bacteriology by 
