L. Olson · L.S. · Loreli Steuer · O's
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Freedom's Ground | 978-0-03-047881-9 | 1980 | Bernard J · Janet Sprout · Lyman C Hunt Weiss |
| Good Help, Good Fun | 978-0-03-050246-0 | ||
| Never Give Up! | 978-0-03-047836-9 | 1980 | Bernard J. Weiss · Eldonna L. Evertts |
| Time To Wonder 1980 Level 13 | 978-0-03-047866-6 | 1980 | Bernard J Weiss · Janet Sprout · Lyman C Hunt |