title: Problems in the estimation of niacin and riboflavin by microbiological methods.
authors.forename: T L
authors.initials: TL
authors.lastname: ZUCH
mesh_terms: D006801:Humans; D009525:Niacin / Q000032:analysis*; D009539:Nicotinic Acids; D012256:Riboflavin / Q000032:analysis*
chemical_list: D009539:Nicotinic Acids; D009525:Niacin; D012256:Riboflavin