| title | author | publisher | bookcover | info |
|---|---|---|---|---|
| An Introduction to Modal Logic | G. E. Hughes - M. J. Cresswell | Methuen and Co Ltd - London |  |  |
| title | author | publisher | bookcover | info |
|---|---|---|---|---|
| An Introduction to Modal Logic | G. E. Hughes - M. J. Cresswell | Methuen and Co Ltd - London | | |
