| U20 World Cup 1981 in Australien - Appearances as Referee |  |
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 |
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| 08/10/1981 | Spain | - | Germany | 2:4 | 1 | - | - |
| 18/10/1981 | Germany | - | Qatar | 4:0 | 2 | - | - |
| U20 World Cup 1981 in Australien - Appearances as Referee | |
|
|
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| 08/10/1981 | Spain | - | Germany | 2:4 | 1 | - | - |
| 18/10/1981 | Germany | - | Qatar | 4:0 | 2 | - | - |
| Complete name: | Arnaldo David Cézar Coelho |
| Born: | 15/01/1943 |
| Place of birth: |
Rio de Janeiro, 
Brazil |
| Nationality: |
Brazil |
| Profession: | Physiklehrer |