Descripción
Publicado:Began with: Vol. 1, no. 1 (4. trimestre 1948)
Descripción Física:1 online resource (volumes) : illustrations, maps
Frecuencia de Publicación:Annual, <1994-1995->
Formato: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.
ISSN:25251813