We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleInvestigation of folic acid requirements in pregnancy.AuthorsWilloughby, M L; Jewell, F JPublicationBritish medical journal, 1966, Vol 2, Issue 5529, p1568ISSN0007-1447Publication typeJournal ArticleDOI10.1136/bmj.2.5529.1568