Our knowledge of the external world.
| Príomhchruthaitheoir: | |
|---|---|
| Údar corparáideach: | |
| Formáid: | LEABHAR |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
[New York]
New American Library
[c1956]
|
| Eagrán: | 2nd ed. |
| Sraith: | Mentor book, MD 298
|
| Ábhair: |