The American frontier
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Washington
Service Center for Teachers of History
[1965]
|
| Edizioa: | 2nd ed. |
| Saila: | Service Center for Teachers of History. Publication
no.8 |
| Gaiak: |