PT - JOURNAL ARTICLE AU - Raven, J L AU - Barkhan, P TI - Assay of vitamin B 12 . AID - 10.1136/jcp.25.12.1101-a DP - 1972 Dec 01 TA - Journal of Clinical Pathology PG - 1101 VI - 25 IP - 12 4099 - http://jcp.bmj.com/content/25/12/1101.1.short 4100 - http://jcp.bmj.com/content/25/12/1101.1.full SO - J Clin Pathol1972 Dec 01; 25