1. Causation of neural tube defects: clues from epidemiology;Leck;Brit Med Bull,1974
2. Genetics of common disorders;Carter;Brit Med Bull,1969
3. Congenital malformations;Warkany,1971
4. Anencephalus in Canada, 1943–1970;Elwood;Am J Epid,1974
5. The incidence of congential abnormalities in British Columbia, Alberta, Manitoba and New Brunswick, 1966–1969;Elwood;Can J Publ Hlth,1975