Quality Software

year of pub­li­ca­ti­onISBNauthor(s)title
1981978-0-912985-00-8Don Worth · Pieter LechnerBeneath Apple DOS
1985978-0-912985-01-5James Fielding SatherUnderstanding the Apple II
1984978-0-912985-05-3Don D. Worth · Pieter M. LechnerBeneath Apple Prodos