• 2 Journals, Magazines, Newspapers

• 2 Childbirth
• 2 Infants
• 1 Birth Rate
• 1 Birth Weight
• 1 Infant Mortality
• 1 Prenatal Care
• 1 Statistics, Vital

• 2 Massachusetts. Bureau of Health Statistics, Research and Evaluation
• 1 Massachusetts. Bureau of Family and Community Health
• 1 Massachusetts. Department of Public Health

• 2 English

• 2 Periodicals
• 1 Statistics, Vital
• 1 statistics

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