DOI: 10.1055/s-00000031

Klinische Monatsblätter für Augenheilkunde

References

Culpepper D.
World Population Ageing 2013 (Report). United Nations. Department of Economic and Social Affairs Population Division, 2014 Mar 13; 1–114.
Im Internet (Stand: 06.09.2020):
https://www.un.org/en/development/desa/population/publications/pdf/ageing/WorldPopulationAgeing2013.pdf

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