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10. [International migration relationships of the Federal Republic of Germany: their contribution to future population trends]. Bucher H. Raumforsch Raumordn; 1993; 51(5):254-64. PubMed ID: 12345488 [Abstract] [Full Text] [Related]
15. [Effect of external migration on the environment and on aging]. De Beer J, Noordam R. Maandstat Bevolking; 1988 Sep; 36(9):16-20. PubMed ID: 12315378 [Abstract] [Full Text] [Related]
17. [The effects of uncertainty about future fertility, mortality, and migration on the development of the population]. De Beer J, Meyer P. Maandstat Bevolking; 1992 Oct; 40(10):21-7. PubMed ID: 12285601 [Abstract] [Full Text] [Related]
18. [Migration of aged people. Its importance and impact on the age structure of the population of the agglomerations of Brussels, Liege, Charleroi, Verviers, and Namur]. Declercq-tijtgat A, Roucloux J. Popul Famille; 1982 Oct; (56):29-69. PubMed ID: 12339774 [Abstract] [Full Text] [Related]