Pisma do dolnata zemya
| Year | 1994 |
|---|---|
| Country | Bulgaria |
| Director | Kostadin Bonev |
| Cinematography | Konstantin Zankov |
| Scriptwriters | Kostadin BonevKonstantin Zankov |
| Produced | Georgi DjulgerovPavel Vasev |
| Music | Nikolay Ivanov |
| Editing | Mariya Handzhieva |
| Genres | DocumentaryShort film |
| Release Date | June 14, 1994 |
| Runtime | 35 min. |