Artist: G: JOHANNES DE GROOT
http://users.bart.nl/~delsman/delsman/d0002/g0000043.html... http://intranet.woodvillehs.sa.edu.au/pages/resources/maths/... http://www-history.mcs.st-andrews.ac.uk/~history/PictDisplay... http://www-groups.dcs.st-and.ac.uk/%7Ehistory/Mathematicians... http://kibrahacha.com/stories/gen/devries/6.htm... http://home-1.worldonline.nl/%7Emachverb/WC01/WC01_307.HTM... ...
