Geography as a discipline is a common topic for almost all courses in 1st year at geography and Environment .  All this links contain detail on it.

http://www.scribd.com/doc/20893854/Geography-as-a-Discipline

http://geog.webs.com/geographyasadiscipline.htm

http://www.physicalgeography.net/fundamentals/1a.html

http://www.mediafire.com/view/?vszpw836ri5h8wv