Podobné jednotky: Black Book - Telephone Competition: A Perilous Transition
- Black Book - Telephone Competition Revisited
- Black Book - American Telephone & Telegraph Company: A Strategic Response to Competition in the 1980's
- Black Book - Telephone Industry (May 1976)
- Black Book - Continental Telephone Corporation (1981)
- Black Book - Telephone Industry (April 1978)
- Black Book - Telephone Industry (December 1975)