The ninth South American Junior Championships in Athletics were held in Asunción, Paraguay from October 21–25, 1972.
Participation (unofficial) Detailed result lists can be found on the "World Junior Athletics History" website. An unofficial count yields the number of about 194 athletes from about 8 countries: Argentina (40), Brazil (32), Chile (33), Colombia (22), Ecuador (6), Paraguay (24), Peru (22), Uruguay (15).
Medal summary
Medal winners are published for men and women
Complete results can be found on the "World Junior Athletics History" website.
Men
* = another source rather states: Hexathlon
Women
Medal table (unofficial)