D.A. · Dorothy Albertson · Dorothy Lee Albertson · L a
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Business Machine Practice Set | 978-0-07-000950-9 (0-07-000950-3) | 1974 |
| RPM Unlimited, a Business Machines Practice Set, Practice Set | 978-0-07-000955-4 (0-07-000955-4) | 1981 |