Description
Published:Began with vol. 1, no. 1 (1953)
Physical Description:1 online resource (volumes) : illustrations (some colour), maps
Publication Frequency:Twice a year, 1954, 1994-1995, 2020-
Format: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:27111318