The six-point design in the U.S.P. microbiological assay of vitamin B12.
D001681:Biological Assay; D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12 / Q000032:analysis*
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
VITAMIN B12/determination