NACLA Archive Microfilm
The NACLA Archive of Latin Americana is "composed of ephemera and serials relating to socioeconomic and political conditions in Latin America from the 1960s through the 1980s."
"The collection consists of 339 rolls of microfilm and is arranged by country and by subject, then chronologically internally. Not all countries will have materials for each topic. Researchers will find a complete list of the country's content at the beginning of the first roll pertaining to each country. Thereafter, each box will carry a listing of contents and in all cases each file has an introductory frame indicating the contents."
Information taken from the project's website at the New School for Social Research.
1) By country:
Argentina, 10 rolls
Human & civil rights
Church & religion
3) Within each subject, chronologically:
From the 1960's to the 1980's.