research in physical quality of children's books

http://www.currentlyobsessed.com/2012/01/04/how-to-print-your-own-childrens-books-that-wont-be-eaten-or-torn-apart/

http://www.instructables.com/id/Childrens-Board-Book/

http://thecardboardcollective.com/2011/10/31/how-to-make-cardboard-books/

http://www.biddles.co.uk

https://www.bookprintinguk.com/publishers/spine-calculator

http://artjournaling.blogspot.co.uk/search/label/tutorial

http://cosmocricket.typepad.com/cosmo_cricket/2012/05/thrifty-thursday-old-books-get-new-lives.html

http://shonastudio.blogspot.co.uk/2009/12/altered-board-books-tutorial.html