@inbook{Schwarz1999,
author = {Schwarz, K.},
title= {The decline of mobility in the twentieth century},
year = {1999},
editor = {Hochstadt, S.},
booktitle = {Mobility and modernity. Migration in Germany, 1820–1989},
address = {Ann Arbor},
publisher = {The University of Michigan Press},
pages = {217--254},
}