Why Pi?de Johnny BallMateriasMathematicsMathematics, juvenile literatureEdiciones (2)Why Pi? (2016)DK Children · ISBN 9781465443878Why Pi? (2009)DK Publishers · ISBN 9780756664770Más obras de Johnny BallBall Of Confusion Puzzles Problems And Perplexing PosersBall Of Confusion Puzzles Problems Perplexing PosersMathmagicians