Thomas Malthus: Verskil tussen weergawes
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* [https://web.archive.org/web/20081020110110/http://www.naf.org.au/papers.htm National Academics Forum, Australia]: a collection of essays for the Malthus Bicentenary Conference, 1998
* ''Conceptual origins of Malthus's Essay on Population'', facsimile reprint of 8 Books in 6 volumes, edited by Yoshinobu Nanagita ({{ISBN|978-4-902454-14-7}}) www.aplink.co.jp/ep/4-902454-14-9.htm
* National Geographic Magazine,
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