Detailed result lists can be found on the "World Junior Athletics History" website.[1] An unofficial count yields the number of about 162 athletes from about 8 countries: Argentina (29), Bolivia (1), Brazil (50), Chile (14), Colombia (45), Peru (4), Uruguay (2), Venezuela (17).
Medal summary
Medal winners are published for men[2] and women[3]
Complete results can be found on the "World Junior Athletics History" website.[1]