Gort, Michael <br/><br/>
Diversification and intergration in American industry 

 - Princeton  Princeton university press  1962 
 - xxi, 238p.; 22cm. 
 - National bureau of economic research .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diversification<br/>Industrial productivity - United States<br/>Industries - United States<br/>Industry size<br/>Integration