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After reading 1584 websites, we found 2 different results for "where was 1978 world cup held"

Argentina

The 1978 World Cup was held in an Argentina darkened by the 'dirty war' against left-wing dissidents being waged by the military junta which had taken power two years earlier.

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at Camp de Polo, Buenos Aires, Argentina

All matches of the 1978 World Cup took place at Camp de Polo, Buenos Aires, Argentina.

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