Industrial experimentation 

 - 4th 
 - NA  NA         1957 
<br/><br/><label>Standard No.: </label>136,206 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X9:B28, J7-J7;3