1. Using Geographical Information Systems to Explore Disparities in Preterm Birth Rates Among Foreign‐born and U.S.‐born Black Mothers 
Joan Rosen Bloch 
Journal of Obstetric, Gynecologic & Neonatal Nursing 
Volume 40, Issue 5, Pages (September 2011)
DOI: /j x
Copyright © 2011 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

2. Figure 1 Environmental stress in Philadelphia by census tract.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , DOI: ( /j x)
Copyright © 2011 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

3. Figure 2 Ethnic population density by Philadelphia census tract.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , DOI: ( /j x)
Copyright © 2011 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions

4. Figure 3 Preterm birth density in Philadelphia by race and nativity.
Journal of Obstetric, Gynecologic & Neonatal Nursing  , DOI: ( /j x)
Copyright © 2011 AWHONN, the Association of Women's Health, Obstetric and Neonatal Nurses Terms and Conditions