"This publication presents information on the 1950 production of electric energy and corresponding installed capacity of electric utility generating plants in the United States...Totals are given for the United States and for each geographic division and state. All data are subdivided to show details by type of prime mover and by class of ownership"--Page i.

"This report summarizes the 1943 data on the production of electric energy and the installed capacity of electric generating plants in the United States. In addition to the 1943 annual totals for the country as a whole, corresponding data are given for each geographic division and for each state"--Page 1.