@article{Henshaw1999,
author = {Henshaw, S.K. and Singh, S. and Haas, T.},
title= {The incidence of abortion worldwide},
year = {1999},
doi = {10.2307/2991869},
journal = {International family planning perspectives},
volume = {25},
number = {Supplement},
pages = {S30--S38},
}