Software :: Reading (WordSAtar/WordPerfect 5.1) Formatting Codes?

I have recently stumbled across some aged lecture notes that were posted to the Internet in the 1990s. And I now have the leisure to read them (and possibly derive some benefit from the reading).

The covering "ReadMe" states that the notes were originally written in WordStar and posted to the Internet as WordPerfect documents. The text is perfectly readable. But the supplied references have formating codes that mean nothing to my readers. An example is:

Plato explicitly says that the Good is "above being"

(i+5df8h-epe-i+5d'keina f8t^-yv oum0-i+9dh chapter s'-iav).

Is there any current reader that understands these code?