@article{Morgan1999,
author = {Morgan, S. Philip and Botev, Nikolai and Chen, Renbao and Huang, Jianping},
title= {White and nonwhite trends in first birth timing: Comparisons using vital registration and current population surveys},
year = {1999},
doi = {10.1023/a:1006245612218},
journal = {Population Research and Policy Review},
volume = {18},
number = {4},
pages = {339--356},
}