Published:Began with v. 1 in July 1, 1978.
Item Description:Starting with volume 26 (Oct. 2002), subscription is to the CD-ROM version, the paper copy is available only to depository libraries.
Physical Description:1 online resource (volumes)
Publication Frequency:Monthly
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.