@inbook{London1995,
author = {London, K. and Peterson, L. and Piccinino, L. },
title= {The National Survey of Family Growth: Principal source of statistics on unintended pregnancy: Supplement to Chapter 2},
year = {1995},
editor = {Brown, S.S. },
editor = {Eisenberg, L. },
booktitle = {The Best of Intentions},
address = {Washington, D.C.},
publisher = {National Academy Press},
pages = {286--295},
}