@book {2107, title = {Racial Differences in Preterm Delivery: Developing a New Research Paradigm}, series = {American journal of preventive medicine}, number = {v. 9, no. 6, suppl}, year = {1993}, pages = {123}, publisher = {Oxford University Press}, organization = {Oxford University Press}, address = {New York}, isbn = {9780195090307}, author = {Diane Rowley and Heather Tosteson} }