Donald Knuth 2013-05-24-15.37.58

2013-05-24-15.37.462013-05-24-15.37.542013-05-24-15.37.582013-05-24-15.38.332013-05-24-15.39.132013-05-24-15.41.262013-05-24-15.41.39
2013-05-24-15.37.58

[ small | medium | large ]