@article{Musick1991,
author = {Musick, K.},
title= {Planned and unplanned childbearing among unmarried women},
year = {1991},
doi = {10.1111/j.1741-3737.2002.00915.x},
journal = {Journal of Marriage and the Family},
volume = {64},
number = {4},
pages = {915--929},
}