Helmer Pedersen, E. 1983. Keijo Virtanen: Settlement or Return. Finnish Emigrants (1860-1930) in the International Overseas Migration Movement. Migration Studies C 5. Turku, The Migration Institute, 1979. 275 s. Historisk Tidsskrift. 14, (jan. 1983). DOI:https://doi.org/10.7146/ht.v14i0.52598.