Publication from Colombiaco/PLPluto11 issues, 1980 to 1981, in Colombian Spanish.Indexed11 of 11 issuesIssues111980s 1 issue1980 114Undated 3 issuesUndated 32531421980s 1 issue1980 145Undated 2 issuesUndated 248501980s 1 issue1981 154Undated 3 issuesUndated 3555763