| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| A Guide to Forecasting For Planners and Managers | 978-0-13-369547-2 (0-13-369547-6) | 1987 |
| Guide to Forecasting for Planners and Managers | 978-0-13-369539-7 (0-13-369539-5) | 1987 |
E. Willis · R. E. · R. Willis · Raymond E · Raymond W. · Raymond Willis