@article{Bumpass1987,
author = {Bumpass, L.L.},
title= {The risk of an unwanted birth: The changing context of contraceptive sterilization in the U.S.},
year = {1987},
doi = {10.1080/0032472031000142946},
journal = {Population Studies},
volume = {41},
number = {3},
pages = {347--363},
}