Getting a subpage listing
To get a list of all the subpages for a particular page, click on Special pages in the toolbox. Then click on All pages at the top of the list. Then select the namespace the page is in (from the pulldown menu), and enter the pagename in the inbox with the caption Display pages starting at, and press Go. If the page's name was "pagename", then all the subpages would start with "pagename/".
Try it now: Special:Allpages