@techreport{NIDI2014,
author = {NIDI, (Netherlands Interdisciplinary Demographic Institute)},
title= {Generations and Gender Contextual Database [electronic resource]},
year = {2014},
URL = {www.ggp-i.org/contextual-database.html},
publisher = {Netherlands Interdisciplinary Demographic Institute},
address = {The Hague},
}