284 // MSN1 / Brain puzzles
A Polish book cover from 1961 by Janusz Stanny: The book is about brain puzzles which is nicely visualised by this image.
Found via http://grainedit.com

A Polish book cover from 1961 by Janusz Stanny: The book is about brain puzzles which is nicely visualised by this image.
Found via http://grainedit.com