Podobné jednotky: Black Book - Petroleum Industry Trends (August 1980)
- Black Book - Petroleum Industry Trends (August 1981)
- Black Book - Petroleum Industry Trends (August 1978)
- Black Book - Petroleum Industry Trends (March 1980)
- Black Book - Petroleum Industry Trends (May 1980)
- Black Book - Petroleum Industry Review (August 1977)
- Black Book - Restaurant Industry Trends (August 1980)