C.H. · C. Hardwick · H. C. · H.H.
| title | ISBN-13 | year of publication |
|---|---|---|
| Words are Important: Bk. 1 | 978-0-273-43412-2 | |
| Words are Important: Bk. 2 | 978-0-273-43413-9 | |
| Words are Important: Bk. 3 | 978-0-273-43414-6 | |
| Words are Important: Bk. 4 | 978-0-273-43415-3 | |
| Words are Important: Bk. 5 | 978-0-273-43416-0 | |
| Words are Important: Introductory Bk | 978-0-273-43418-4 | |
| Words are Important: Introductory Book: Simplified edition | 978-0-273-43417-7 | |
| Words are Important: Junior Bk | 978-0-273-40115-5 |