@misc{Webb_John_N._(1899-_)_Migrant_1938,
 author={Webb, John N. (1899- )},
 address={Washington},
 howpublished={online},
 year={1938},
 publisher={United States Government Printing Office},
 title={Migrant families},
 keywords={migracja zewnętrzna, polityka rodzinna},
}