Agitation about the need to supply consumers with coal already in the summer months of the year.
| Release Date | December 31, 1950 | |
|---|---|---|
| Status | Released | |
| Original Title | Zima se zeptá | |
| Runtime | — | |
| Budget | — | |
| Revenue | — | |
| Language | Czech | |
| Original Language | Czech | |
| Production Countries | Czechoslovakia | |
| Production Companies | Studio populárně vědeckých a naučných filmů Praha | |