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
Site text is available in English, Spanish and Portuguese, article text is primarily Spanish.
Description based on: Vol. 1, no. 1 (May 1939); title from PDF title page (University of Pittsburgh Library System’s website, viewed Apr. 5, 2010).
Latest issue consulted: Vol. 78, no. 240 (Jul./Sept. 2012) (publisher’s Web site, viewed Aug. 22, 2012).