User contributions
- 10:33, 13 April 2016 (diff | hist) . . (+744) . . Talk:1667: Algorithms
- 10:26, 13 April 2016 (diff | hist) . . (+398) . . 1667: Algorithms
- 16:23, 2 April 2013 (diff | hist) . . (+1) . . 1193: Externalities (→First Panel)
- 16:23, 2 April 2013 (diff | hist) . . (+211) . . 1193: Externalities
- 00:52, 2 April 2013 (diff | hist) . . (0) . . N File:externality-dog9.png