UN Inter-agency Group for Child Mortality Estimation. CHILD SURVIVAL: KEY FACTS AND FIGURES(PDF). Levels & Trends in Child Mortality. 2018, (Report 2018): 2 [2019-09-13]. (原始内容(PDF)存档于2020-02-08).
Hall ES, Venkatesh M, Greenberg JM. A population study of first and subsequent pregnancy smoking behaviors in Ohio. Journal of Perinatology. November 2016, 36 (11): 948–953. PMID 27467563. S2CID 29303225. doi:10.1038/jp.2016.119.
Hall ES, Venkatesh M, Greenberg JM. A population study of first and subsequent pregnancy smoking behaviors in Ohio. Journal of Perinatology. November 2016, 36 (11): 948–953. PMID 27467563. S2CID 29303225. doi:10.1038/jp.2016.119.
Hall ES, Venkatesh M, Greenberg JM. A population study of first and subsequent pregnancy smoking behaviors in Ohio. Journal of Perinatology. November 2016, 36 (11): 948–953. PMID 27467563. S2CID 29303225. doi:10.1038/jp.2016.119.
UN Inter-agency Group for Child Mortality Estimation. CHILD SURVIVAL: KEY FACTS AND FIGURES(PDF). Levels & Trends in Child Mortality. 2018, (Report 2018): 2 [2019-09-13]. (原始内容(PDF)存档于2020-02-08).