Issues for June 1968-Jan. 1971 unnumbered but constitute nos. 1-27; issues for Feb. 1971-1979 called nos. 28-83/85; vol. numbering began with vol. 11, no. 1, Sept. 1979.
Publication suspended, July/Aug. 1985-June 1986.
Vol. 16, no. 5, 1985 redesignated as June 1986.
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
Description based on: June 1968; title from caption on PDF of issue (publisher’s Web site, viewed Apr. 1, 2013).