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Darwin and Malthus : few articles.

1. Who was Thomas Malthus : article from Encyclopaedia Britannica  :  https://www.britannica.com/biography/Thomas-Malthus

2. Who was Darwin :  article from Encyclopaedia Britannica   https://www.britannica.com/biography/Charles-Darwin

3. Darwin and Malthus : evolution library http://www.pbs.org/wgbh/evolution/library/02/5/l_025_01.html

4. Darwin, Malthus and natural selection : an historical introduction to evolution, see www.webpages.uidaho.edu/~snuismer/Nuismer_Lab/314/Lectures/Lecture%203.pdf

5. Darwin and Malthus : university of Arizona.  Darwin and Malthus selection. Author : Sandra Herbert, Source: Journal of the History of Biology, Vol. 4, No. 1 (Spring, 1971). See : www.blc.arizona.edu/courses/schaffer/449/Darwin/Herbert%20-%20Darwin%20Malthus%20Selection.pdf