Hall, M H Folic acid deficiency and congenital malformation. [electronic resource] - The Journal of obstetrics and gynaecology of the British Commonwealth Feb 1972 - 159-61 p. digital Publication Type: Journal Article ISSN: 0022-3204 Standard No.: 10.1111/j.1471-0528.1972.tb15772.x doi Subjects--Topical Terms: Congenital Abnormalities--etiologyFemaleFolic Acid--bloodFolic Acid Deficiency--complicationsHumansPregnancyPregnancy ComplicationsProspective Studies