Ítems similars: Black Book - Telephone Industry (April 1978)
- Black Book - Telecommunications Industry Trends (April 1978)
- Black Book - Telephone Industry: The Question of The Interstate Rate of Return (April 1984)
- Black Book - Telephone Industry (May 1976)
- Black Book - Telephone Industry (December 1975)
- Black Book - Telephone Industry (October 1976)
- Black Book - Telephone Competition Revisited