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2009
Project Gutenberg
PGUSA
eng
TxAuBib
Darwin, Charles,
1809-1882.
The Origin of Species by Means of Natural Selection
[Gutenberg] :
Or, the Preservation of Favoured Races in the Struggle for Life, 6th Edition /
Charles Darwin.
Project Gutenberg,
1999.
See also PG#1228 for the First Edition.
Public domain in the USA.
Text.
Natural selection.
Evolution (Biology.)
http://www.gutenberg.org/ebooks/2009
TXGID