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
Mode of access: World Wide Web.
Description based on: Vol. 385, no. 6612 (Jan. 9, 1997); title from journal homepage (publisher’s Web site, viewed Sept. 28, 2005).