Jacques R. Helfer
Author 1
| Title | Format | |
|---|---|---|
 | How to Know the Grasshoppers, Cockroaches and their Allies | Paperback |
Illustrator 1
| Title | Format | |
|---|---|---|
| How to Know the Grasshoppers, Cockroaches and their Allies | Paperback |
| Title | Format | |
|---|---|---|
| How to Know the Grasshoppers, Cockroaches and their Allies | Paperback |
| Title | Format | |
|---|---|---|
| How to Know the Grasshoppers, Cockroaches and their Allies | Paperback |