@book{Puur2009b,
author = "Puur, A. and Põldma, A. and Sakkeus, L.",
title = "Estonian family and fertility survey, 2nd round. Standard tabulations. Foreign-origin population.",
year = 2009,
journal = "RU Series C",
publisher = "Eesti Korgkoolidevaheline Demouuringute Keskus",
volume = 27
}