@inbook{Fitch2000,
author = {Fitch, C.  and Ruggles, S. },
title= {Historical trends in marriage formation: The United States 1850–1990},
year = {2000},
editor = {Waite, L.J.},
booktitle = {The ties that bind: Perspectives on marriage and cohabitation},
address = {New York},
publisher = {Aldine de Gruyter},
pages = {59--88},
}