Thud and Blunder in "Knock-Off Time"
- बर्ष: 1964
- देश: United Kingdom
- विधा: Animation
- स्टुडियो: National Coal Board Film Unit, BFI, TVC London
- कीवर्ड: safety, coal mining, miners, civil disobedience, collier, psa, public information film
- निर्देशक:
- जात: