Casida, L E Microorganisms in unamended soil as observed by various forms of microscopy and staining. [electronic resource] - Applied microbiology Jun 1971 - 1040-5 p. digital Publication Type: Journal Article ISSN: 0003-6919 Standard No.: 10.1128/am.21.6.1040-1045.1971 doi Subjects--Topical Terms: AcridinesAzotobacter--cytologyBacteria--cytologyCell WallEdetic AcidGentian VioletMethodsMicroscopyMicroscopy, FluorescenceMuramidasePeptide HydrolasesRose BengalSarcina--cytologySoilSoil MicrobiologyStaining and LabelingTolueneUltraviolet Rays