| U20 World Cup 1981 in Australien - Appearances as Assistant | ||||
| 03/10/1981 | Spain | - | Egypt | 2:2 |
| 06/10/1981 | Mexico | - | Spain | 1:1 |
| 11/10/1981 | Australia | - | Germany | 0:1 |
| U20 World Cup 1981 in Australien - Appearances as Assistant | ||||
| 03/10/1981 | Spain | - | Egypt | 2:2 |
| 06/10/1981 | Mexico | - | Spain | 1:1 |
| 11/10/1981 | Australia | - | Germany | 0:1 |
| Complete name: | Arnaldo David Cézar Coelho |
| Born: | 15/01/1943 |
| Place of birth: |
Rio de Janeiro, 
Brazil |
| Nationality: |
Brazil |
| Profession: | Physiklehrer |