The 2006 impact factor of Web of Science specialized Journals and subsets of articles from Argentina, Brazil, Chile and Mexico.

Data were collected from Thomson Reuters WoS data base. Two columns of IF are shown for each country for selected journals. One is for the total of articles of the country and the other for articles with affiliation of the country only, without collaboration. For each journal the corresponding 2006 citations of 2004+2005 articles and the number of 2004+2005 articles are shown, below each IF value .The dashed lines correspond to indefinite or imprecise IF for 0 articles or very low number of articles (typically 1).