R. A. · Robert A. · Robert Ullrich
Prentice Hall · UMI Books on Demand
| title | ISBN-13 | year of publication |
|---|---|---|
| Motivation methods that work | 978-0-13-603852-8 | 1981 |
| Motivation Methods That Work | 978-0-13-603860-3 | 1981 |
| Robotics Primer: The What, Why and How of Robots in the Workplace | 978-0-317-18019-0 | 1983 |
| The robotics primer: The what, why, and how of robots in the workplace | 978-0-13-782144-0 | 1983 |