| "The nature of third molars: are third molars different than other teeth? Published by Allyn and Bacon, Boston, MA | |
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| American Psychological Association From Gerrig, Richard J | Encyclopedia of the social and cultural foundations of education |
"Asynchronous development" is now an accepted aspect of maturation.
| Peabody Journal of Education, Vol | Atlas of the Oral and Maxillofacial Surgery Clinics of North America |
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| Psychological Review 33 1926 : 268-278 |