@incollection{KreyenfeldWillekens2015, author = {Michaela Kreyenfeld and F.J. Willekens}, title = {Data bases and statistical systems: demography}, booktitle = {International encyclopedia of the social and behavioral sciences}, editor = {James Wright}, isbn = {978-0-08-097086-8}, doi = {10.1016/B978-0-08-097086-8.41013-5}, year = {2015}, }