Below is a list of links to other sites that sell new and used books, and may also have further information about books you are looking for. Biocrawler is not affiliated with any of these businesses, and this list should not be construed as an endorsement.
Wikipedia (http://en.wikipedia.org/wiki/Main_Page)
MediaWiki:Booksourcetext (http://en.wikipedia.org/wiki/MediaWiki:Booksourcetext)
version history (http://en.wikipedia.org/w/index.php?title=MediaWiki:Booksourcetext&action=history)
GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License)
CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)
