This article aims to identify the keywords included in the articles published in “Pensamiento Americano” Journal during the period 2013-2016 that are also included in UNESCO thesaurus. In order to do so, keywords included in each article are identified, articles including the same keywords are counted and keywords included in UNESCO thesaurus are identified. Less than a quarter of the keywords are found in the UNESCO thesaurus, by order of participation, in: Politics, Law and Economics , Social and human sciences , Culture , Countries and country groupings , Information and communication , Education , Science . Keywords: Quantitative analysis. Information sciences. Social science information. Measurement. Thesaurus.