[Characterization of vitamin B 12 in liver extracts].
D045728:Corrinoids; D006397:Hematinics; D008110:Liver Extracts / Q000737:chemistry*; D014805:Vitamin B 12 / Q000737:chemistry*
D045728:Corrinoids; D006397:Hematinics; D008110:Liver Extracts; D014805:Vitamin B 12
LIVER EXTRACTS/chemistry; VITAMIN B 12/chemistry