1. Incidence of cleft lip and palate: constant or increasing Acta Chir Scand.;Fogh-Andersen,1961
2. Incidence of clefts in New York City.;Conway;Cleft Palate J,1966
3. Clefts in Wisconsin: incidence and related factors.;Gilmore;Cleft Palate J,1966
4. Congenital malformations in singletons: epidemiologic survey. Report from the Collaborative Perinatal project.;Myrianthopoulos;Birth Defects Orig Artic Ser,1974
5. The etiology of human malformations: Insights from epidemiology.;Leck;Teratology,1972