Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2010.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212
Chiefly in Spanish; some in English and Portguese. Effective 2008, abstracts and keywords appear in English as well as in language of article. Effective 2012, abstracts and keywords appear in Spanish for articles in English. Effective 2016, titles appear in English or Spanish as well as language of article. For vol. 16, núm. 62 (Mayo/Agosto 2016), titles, abstracts, and keywords appear in Portuguese for articles in English.