@article{England2012,
author = {England, P. and Shafer, E.F. and Wu, L.},
title= {Premarital conceptions, postconception (“shotgun”) marriages, and premarital first births},
year = {2012},
doi = {10.4054/DemRes.2012.27.6},
volume = {27},
number = {6},
pages = {153--166},
}