@article{1e1700d46ef444628c6df759edabacfb,
title = "Genetic influence on age at first birth of female twins born in the UK, 1919-68",
keywords = "gene-environment interaction, twins, heredity, fertility, reproductive age, age at first birth, heritability, UK",
author = "Tropf, \{Felix C.\} and Nicola Barban and Mills, \{Melinda C.\} and Harold Snieder and Mandemakers, \{Jornt J.\}",
year = "2015",
month = may,
day = "4",
doi = "10.1080/00324728.2015.1056823",
language = "English",
volume = "69",
journal = "Population Studies",
issn = "0032-4728",
publisher = "United Nations Publications",
number = "2",
}