| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Clear Grammar 2 Student Workbook: More Activities for Spoken and Written Communication | 978-0-472-08726-6 (0-472-08726-6) | 2001 | Keith S. Folse · Barbara Smith-Palinkas · Elena Vestri Solomon |
| Clear Grammar 4: Activities for Spoken and Written Communication | 978-0-472-08886-7 (0-472-08886-6) | 2003 | Keith S. Folse · Deborah Mitchell · Barbara Smith-Palinkas |