Grey literature, documentation published outside traditional commercial channels, is not very often taken into account by art librarians in Argentina, judging by searches on online databases. However, experience with grey literature at the Fundación Espigas, the highly specialized Argentinian art information center in Buenos Aires, is changing this point of view. The Center’s database offers access to a great corpus of such publications, especially to ephemera such as private view cards, pamphlets, auction catalogues, catalogues of solo and group exhibitions and posters. This ‘minimal documentary information’ has an important place as a resource, and would prove invaluable for any research project on Argentine art in the future. Indeed this material is not grey but unexpectedly brilliant at providing rich and hidden information.