[The spectrophotometric determination of vitamin B 12 in ampules and concentrated liver extracts].
D008110:Liver Extracts / Q000737:chemistry*; D013053:Spectrophotometry; D014805:Vitamin B 12 / Q000737:chemistry*
D008110:Liver Extracts; D014805:Vitamin B 12
LIVER EXTRACTS/chemistry; VITAMIN B 12/chemistry