Cooperation between research in agricultural natur 

 -  1964 
 - Its documentation in agriculture and food, 65. .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Industries
<br/><br/><label>Dewey Class. No.: </label>X9(J)b4, K4