Katz, S E Comparison of two analytical methods for penicillin residues in milk. [electronic resource] - Journal - Association of Official Analytical Chemists Jul 1974 - 819-22 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0004-5756 Subjects--Topical Terms: AnimalsBacteriological TechniquesCattleCentrifugationFemaleLactationMammary Glands, Animal--metabolismMastitis, Bovine--drug therapyMethodsMilk--analysisPenicillin G Procaine--metabolismPenicillins--analysisPregnancy