| title | media type | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|---|
| How Big Is a Foot? | School & Library Binding | 978-0-8335-6853-3 (0-8335-6853-1) | 1999 |
| How Big Is a Foot? | Paperback | 978-0-440-40495-8 (0-440-40495-9) | 1991 |
| The Bible puzzle book | Unknown Binding | 978-0-06-066060-4 (0-06-066060-0) | 1977 |
Ralf Mahler · Ralf Möller · Ralf Müller · Ralf Muller · Ralph Müller · Ralph Muller · Rolf Miller · Rolf Möller · Rolf Müller