Conference proceedings 

 - St. Joseph, Mich. :  American Society of Agricultural Engineers,  1966? 
 - 78 p.  : ilus. ; gráfs. 
<br/><br/><label>LCCN: </label>21301 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua--Efecto en plantas.<br/>Drenaje.