title: The determination of penicillins and chlortetracycline n premixes and mixed feeds.
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D002751:Chlortetracycline / Q000032:analysis*; D010406:Penicillins / Q000032:analysis*
chemical_list: D010406:Penicillins; D002751:Chlortetracycline