Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Population aging 1 SEE ALSO: Age distribution (Demography) 6 Population aging -- Economic aspects. 2 Population aging -- Europe. 1 Population aging -- Political aspects -- United States. 2 Population aging -- United States. 2 Population assistance, American. 2 Population assistance, American -- Law and legislation. 1 Population assistance -- Finance -- Law and legislation -- United States. 1 Population -- Bibliography -- Periodicals. 1 Population biology 3 SEE ALSO narrower term: Age-structured populations 2 SEE ALSO narrower term: Animal populations 3 SEE ALSO narrower term: Biological invasions 8 SEE ALSO narrower term: Biotic communities 51 SEE ALSO: Ecology. 188 SEE ALSO narrower term: Plant populations 3 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >