A Pedra da Riqueza (1975)
The contrast in the extremely rudimentary form of xelite mining and the use of tungsten, obtained from xelite, in the most complex instruments of nuclear technology.
Director: Vladimir Carvalho
| Directing | Vladimir Carvalho | Director |
| Writing | Vladimir Carvalho | Writer |
| Sound | Fernando Cerqueira | Original Music Composer |
| Editing | João Ramiro Mello | Editor |
| Camera | Fernando Duarte | Camera Operator |
| Camera | Manuel Clemente | Camera Operator |
| Camera | Walter Carvalho | Director of Photography |