//-->
Demographic aspects of aging and the older population in the United States
Siegel, Jacob S., (1976)
The aged in an altered social and demographic
Dooghe, G., (1984)
Old-age dependency : is it really increasing in aging populations?
Abeysinghe, Tilak, (2019)
2000 housing and population census, Republic of Mauritius
(2000)
Digest of industrial statistics
(1987)
Household budget survey