1. Human Variety;Levontin,1982
2. Neural crest cell formation and migration in the developing embryo;Bronner;FASEB J,1994
3. Mammalian neural crest and neural crest derivatives;Morris;Anat Anz,1993
4. Anatomical variation, human diversity, and environmental adaptation;Johnson;J Natl Med Assoc,1993
5. Embryology of the Head and Neck;Johnston,1990