Hart, Michael,  1947-2011 <br/><br/>
Price/Cost Indexes from 1875 to 1989; Estimated to 2010  [electronic resource] / 
Michael Hart 
 -  Project Gutenberg,  1993 
 - Project Gutenberg  88 .
<br/><br/> Originally published as a column entitled: The Rate of Change of the Rate of Change, in the Electronic Journal of Virtual Culture 
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Cost and standard of living 
<br/><br/><label>LC Class. No.: </label>HG