The article describes the different notions of border developed in the book La geografía y la historia en la identidad nacional (1981), written by geographers and historians during the last dictatorship in Argentina and published by the Association for the Promotion of Territorial and Environmental Studies (OIKOS).The book was compiled by the Catholic nationalist architect Patricio Horacio Randle.On the basis of the analysis carried out, the article shows how the notions of border presented there were strongly influenced by the political context of the dictatorship and by the border issues prevailing at that particular moment.In line with the findings of other researchers, the paper concludes that these types of books sought to contribute to the process of legitimating the dictatorial regime.