제10장 : 생후 4∼6개월 영아들의 성장과 발육
www.drleepediatrics.com – Volume 3. Child and Adolescent Growth, Development, and Parenting (Newborns, Infants, School-aged Children, Puberty, Growth, Development, and Parenting) Chapter 10: Growth and development of infants 4 to 6 months old