@inbook{Fassmann2009,
author = {Fassmann, H.},
title= {European Migration: Historical Overview and Statistical Problems},
year = {2009},
doi = {10.5117/9789089640529},
editor = {Fassmann, H.},
editor = {Reeger, U.},
editor = {Sievers, W.},
booktitle = {Statistics and Reality: Concepts and Measurements of Migration in Europe},
address = {Amsterdam},
publisher = {Amsterdam University Press},
pages = {21--44},
}