Mary, I've got a hint for you:

http://www.pbs.org/cgi-registry/whatson/template.cgir?s=WGBH&t=1&c=m&d=2003-7

Take the above, put your stations call letters in place of WGBH, and then the year and month as shown at the end. That'll get you an online list for the month for your station.