http://ezinearticles.com/?Semester-System-Vs-Quarter-System---Which-One-Is-Right-For-You?&id=1119677
http://clearinghouse.missouriwestern.edu/manuscripts/127.asp?logon=&code=
http://xatal.com/california/csus-ucs-on-quarter-or-semester-system/
http://xatal.com/college/semester-vs-quarter-system-whats-the-difference/
http://talk.collegeconfidential.com/college-life/31512-quarter-vs-semester.html