Gruft, H The tween opacity test as an aid in classification of mycobacteria. [electronic resource] - The American review of respiratory disease Nov 1977 - 955-6 p. digital Publication Type: Journal Article ISSN: 0003-0805 Standard No.: 10.1164/arrd.1977.116.5.955 doi Subjects--Topical Terms: Bacteriological TechniquesMycobacterium--classificationPolyethylene GlycolsPolysorbates