Co-operation with the central mining research stat 

 - NY  UN         1965 
 - 52p  cm. 
<br/><br/><label>Standard No.: </label>83559 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Co-operative Economics
<br/><br/><label>Dewey Class. No.: </label>"XM,9(Z).2.N7, K5/UN"