Some links that
may be of your interest ...

Argentine Newspapers in web

Ambito Financiero
Buenos Aires Herald (english)
Clarín
Cronista comercial
La Nación

Argentine Official organisms

A.F.I.P. - Federal Administration of Public Revenues
A.N.Se.S. - National Administration of the Social Security
Ministerio de Economía y Obras y servicios públicos - Ministry of Economy