You can download the tutorial or read it online from here.
www.har-bal.com/files/tutorial.pdf
You can also go here to view a multimedia presentation if you use reference files.
http://www.har-bal.com/demo/harbaledit.html
Complete Mastering Tutorial
http://hdqtrz.com/Files/Har-Bal_Mastering_Process.pdf
Cheers
Earle