Access hidden files on copy protected ATX discs?

Hi all-

To my incredible delight, I just discovered that an Atari 800 BASIC program that I wrote for Sunburst Communications in 1983 was available online:

http://www.atarimania.com/game-atari-400-800-xl-xe-targets-a-number-game_12129.html

This was my first job - my first summer of high school. I was actually able to get this to run on Atari800Win...incredible blast from the past!

The publisher copy protected this disk...the directory is scrambled, and if I hit BREAK, it stops the BASIC code but then immediately reboots. (I forget how we did that!)

Anyway, I really want to be able to access the BASIC source code of this disc - it would be like a time capsule into my young brain.

Can anyone tell me how I might be able to access the actual BASIC files on this disk image?

Thanks!
David