Aptitud (biologia) (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Aptitud (biologia)" in Catalan language version.

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«Letter 5140 – Wallace, A. R. to Darwin, C. R., 2 July 1866». Darwin Correspondence Project. [Consulta: 12 gener 2010].
«Letter 5145 – Darwin, C. R. to Wallace, A. R., 5 July (1866)». Darwin Correspondence Project. [Consulta: 12 gener 2010].
^ "Herbert Spencer in his Principles of Biology of 1864, vol. 1, p. 444, wrote: 'This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection", or the preservation of favoured races in the struggle for life.'" Maurice E. Stucke, Better Competition Advocacy, <http://works.bepress.com/cgi/viewcontent.cgi?article=1000&context=maurice_stucke>. Consulta: 29 agost 2007, citing HERBERT SPENCER, THE PRINCIPLES OF BIOLOGY 444 (Univ. Press of the Pac. 2002.)

«Letter 5140 – Wallace, A. R. to Darwin, C. R., 2 July 1866». Darwin Correspondence Project. [Consulta: 12 gener 2010].
«Letter 5145 – Darwin, C. R. to Wallace, A. R., 5 July (1866)». Darwin Correspondence Project. [Consulta: 12 gener 2010].
^ "Herbert Spencer in his Principles of Biology of 1864, vol. 1, p. 444, wrote: 'This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection", or the preservation of favoured races in the struggle for life.'" Maurice E. Stucke, Better Competition Advocacy, <http://works.bepress.com/cgi/viewcontent.cgi?article=1000&context=maurice_stucke>. Consulta: 29 agost 2007, citing HERBERT SPENCER, THE PRINCIPLES OF BIOLOGY 444 (Univ. Press of the Pac. 2002.)

Haldane, J. B. «A mathematical theory of natural and artificial selection--I. 1924». Bulletin of Mathematical Biology, 52, 1-2, 1990, pàg. 209–240; discussion 201–207. ISSN: 0092-8240. PMID: 2185859.
Hamilton, W. D. «The genetical evolution of social behaviour. I». Journal of Theoretical Biology, 7, 1, 7-1964, pàg. 1–16. DOI: 10.1016/0022-5193(64)90038-4. ISSN: 0022-5193. PMID: 5875341.

Haldane, J. B. «A mathematical theory of natural and artificial selection--I. 1924». Bulletin of Mathematical Biology, 52, 1-2, 1990, pàg. 209–240; discussion 201–207. ISSN: 0092-8240. PMID: 2185859.
Hamilton, W. D. «The genetical evolution of social behaviour. I». Journal of Theoretical Biology, 7, 1, 7-1964, pàg. 1–16. DOI: 10.1016/0022-5193(64)90038-4. ISSN: 0022-5193. PMID: 5875341.