http://kickass.to/chemistry-ebooks-collection-vol-11-handbooks-encyclopedias-t1851119.html#main

http://rutracker.org/forum/viewtopic.php?t=2829376

http://kickass.to/encyclopedia-e-book-collection-mdb-t8011502.html#main

http://www.vitorrent.org/torrent/1bb80659792036e8b03626a1db6143f9a43360c8