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@techreport{Koops2020a,
author = "Judith C. Koops",
title = "Understanding nonmarital childbearing: the role of socio-economic background and ethnicity in Europe and North-America.",
year = 2020,
publisher = "University of Groningen",
institution = "University of Groningen / Netherlands Interdisciplinary Demographic Institute",
url = "https://doi.org/10.33612/diss.122182975"
}