The Bell System Technical Journal vol 57 no. 5, May-June 1978, single issue.
AT&T 1978, pp 1231-1715 inclusive, diagrams, photographs, references.
AT&T 1978, pp 1231-1715 inclusive, diagrams, photographs, references.
Mitsubishi Electric 1985; stated first edition February 1985; approximately 103 pages, diagrams, tables.