Fabricant, Solomon,  1906- <br/><br/>
Basic facts on productivity change 

 - New York:  National Bureau of Economic Research,  1959 
 - 49p. ;  23 cm 
 - National Bureau of Economic Research;  Occasional paoer 63 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor productivity--United States
<br/><br/><label>Dewey Class. No.: </label>PS 330.97306273 N37 no.63