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 |
| Editing | João Ramiro Mello | Editor |
| Sound | Fernando Cerqueira | Original Music Composer |
| Camera | Walter Carvalho | Director of Photography |
| Camera | Manuel Clemente | Camera Operator |
| Camera | Fernando Duarte | Camera Operator |