Διαφορά μεταξύ των αναθεωρήσεων του «Πυραμίδα ηλικιών»

Διάσωση 1 πηγών και υποβολή 0 για αρχειοθέτηση.) #IABot (v2.0
(Διάσωση 2 πηγών και υποβολή 0 για αρχειοθέτηση.) #IABot (v2.0)
(Διάσωση 1 πηγών και υποβολή 0 για αρχειοθέτηση.) #IABot (v2.0)
* [http://www.abs.gov.au/websitedbs/d3310114.nsf/home/population%20pyramid%20preview Australian animated population pyramids, Australian Bureau of Statistics]
*[http://www.china-profile.com/data/ani_ceu_pop.htm# China, Europe, USA: Population by Age and Sex, 1950-2050]. Moving Age Pyramids.
*[https://web.archive.org/web/20090903110552/http://www.census.gov/ipc/www/idbpyr.html U.S. Census Bureau, Population Pyramids for Countries of the World]
*[https://web.archive.org/web/20070614091659/http://www.geocities.com/funnyguy_35/DefenceTraining.PDF Gunnar Heinsohn: Demography and War] (brief outline of Heinsohn's Youth Bulge Theory of social unrest)
*[https://web.archive.org/web/20070614091659/http://www.geocities.com/funnyguy_35/HeinsohnPopulation.PDF Gunnar Heinsohn: Population, Conquest and Terror in the 21st Century] (Heinsohn applies his Youth Bulge Theory of social unrest to European imperialism as well as today's Islamist terror)
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