Introductions

http://writing2.richmond.edu/writing/wweb/intros.html

http://www.writing.utoronto.ca/images/stories/Documents/intros-and-conclusions.pdf

http://www.unc.edu/depts/wcweb/handouts/introductions.html

http://efwr.ucalgary.ca/organdstructure

http://www.sass.uottawa.ca/writing/kit/structure-introduction.php