https://ecourses.ou.edu/cgi-bin/navigation.cgi?course=th
http://www.physics.ucla.edu/demoweb/demomanual/matter_and_thermodynamics/index.html
http://web.mit.edu/16.unified/www/FALL/thermodynamics/index.html?downloadURL=true&loId=E5637F18-0407-4345-BA9F-655CE1641315
http://delicious.com/tag/thermodynamics