@article{Schirm1982,
author = {Schirm, A.L., Trussell, J., Menken, J., and Grady, W.R. },
title= {Contraceptive Failure in the United States: The Impact of Social, Economic and Demographic Factors},
year = {1982},
doi = {10.2307/2134816},
journal = {Family Planning Perspectives },
volume = {14},
pages = {68--75},
}