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Needless to say, this is still a good textbook of bacteriology. The ninth edition was revised by a group of bacteriologists from Duke University School of Medicine led by Smith and Martin. This edition remains much the same as the previous one except for additions made necessary by recent developments, including those evolved as a result of World War II. Among the additions are excellent electron micrographs and discussions of the antibiotics. The sections on bacterial metabolism and fungus and viral disease were rewritten to bring the discussion up to date. This edition is to be recommended to students and physicians as a single volume textbook of bacteriology.