Mark Horner A blog about mixing technology, education, openness, and experience in South Africa. Feed: http://www.markhorner.net/2013/08/21/community-driven-ieb-physics-and-chemistry-books/'http:/www.markhorner.net/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/ngglegacy/xml/media-rss.php