Challenge to agronomy for the future / 
Robert S. Whitney, editor. 
 - Madison, WI :  American Society of Agronomy,  1967. 
 - Special publication / American Society of Agronomy ;  no. 10 .
<br/><br/>Incluye bibliografía. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agronomía
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Texto