The face of the Great Replacement

 Replacement Migration: Is it A Solution to Declining and Ageing
Populations? 
Department of Economic and Social Affairs
United Nations Secretariat
United Nations Organization
www.un.org/esa/population/unpop.htm. 
For further information, please contact
the office of Mr. Joseph Chamie, Director, Population Division, United Nations, 
New York 10017, USA.
https://www.un.org/development/desa/pd/sites/www.un.org.development.desa.pd/files/unpd-egm_200010_un_2001_replacementmigration.pdf