| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Working With World Regional Geography 2e | 978-0-7167-4692-8 (0-7167-4692-1) | 2002 | Helen Ruth Aspaas · Lydia Mihelic Pulsipher · Alex Pulsipher |
| World Regional Geography Mapping Workbook | 978-1-4292-5349-9 (1-4292-5349-5) | 2011 | Helen Ruth Aspaas |