Complete source list – Link #137: You Always See The Same Side Of The Moon!
http://lroc.sese.asu.edu/learn/science8
http://en.wikipedia.org/wiki/Tidal_locking
http://en.wikipedia.org/wiki/Near_side_of_the_Moon
http://www.moonconnection.com/moon-same-side.phtml
http://www.enchantedlearning.com/subjects/astronomy/moon/Moononeside.shtml
http://www.todayifoundout.com/index.php/2014/02/side-moon-always-faces-earth/
http://www.nasa.gov/audience/forstudents/brainbites/nonflash/bb_home_moonrotation.html
