title: Radioisotopic method for vitamin B12 assay in pharmaceutical preparations.
mesh_terms: D000818:Animals; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011817:Rabbits; D011863:Radioimmunoassay; D014805:Vitamin B 12 / Q000032:analysis*
chemical_list: D004364:Pharmaceutical Preparations; D014805:Vitamin B 12