RT Journal Article SR Electronic T1 Estimation of serum folic acid activity. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 410 DO 10.1136/jcp.19.4.410 VO 19 IS 4 A1 G H Spray A1 I J Temperley YR 1966 UL http://jcp.bmj.com/content/19/4/410.abstract AB