National Bureau of Economic Research. <br/><br/>
Output, Employment, and Productivity in the United States After 1800 / National Bureau of Economic Research 

 - New York  National Bureau of Economic Research  1966 
 - 660p. 
 - National Bureau of Economic Research Studies in Income and Wealth .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Employment - Productivity - United States<br/>Labour Economics