Microbiology Classification Congresses Identification Microorganisms Bacteria Bacteriology Food spoilage Laboratory manuals Psychrophilic bacteria Bacteria -- Ecology Body, Human Ecology Food Food -- Microbiology Medical microbiology Micro-organisms, Phytopathogenic Microbial ecology Microbial populations Microbiology -- Classification Microbiology--Classification Microorganisms -- Identification Microorganisms--Identification Sanitary microbiology Technique