Donald Knuth 2013-05-24-14.54.12

2013-05-21-12.37.452013-05-21-12.58.172013-05-24-14.54.122013-05-24-14.54.282013-05-24-15.10.272013-05-24-15.10.492013-05-24-15.17.51
2013-05-24-14.54.12

[ small | medium | large ]