University of Nebraska College of Agriculture <br/><br/>
University of Nebraska : Quarterly 

 - 1960-1961 
<br/><br/> -Existencias: 1960 vol. 7, no. 2, 4; 1961 vol. 8, no. 1-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura