[By] Federal Power Commission, Bureau of Power.
"Based on information to June 30, 1970."
Includes "Key map," and insets, "Plant list," and "Ownership list."
1. Northeastern region.--2. Great Lakes region.--3. North central region.--4. Northwestern region.--5. Southwestern region.--6. South central region.--7. Southeastern region.--8. Alaska, Hawaii, Puerto Rico and the Virgin Islands.