Penz, Alton J. <br/><br/>
A national index for energy productivity :  a study / 
prepared for the use of the Joint Economic Committee, Congress of the United States 
 - Washington, D.C. :  Joint Economic Committee, Congress of the United States,  1981 
 - v, 42 p. :  ill. ;  24 cm. 
<br/><br/> Authors: Alton Penz and Dennis Bakke  G.P.O. sales statement incorrect in publication 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energy development--Economic aspects--Mathematical models--United States<br/>Energy consumption--Economic aspects--Mathematical models--United States<br/>Economic indicators--United States<br/>Index numbers (Economics)
<br/><br/><label>Dewey Class. No.: </label>330.973021