Optimization of irrigation and drainage systems :  Irrigation and Drainage Specialty Conference, Lincoln, Nebrasa, Octaber 6-8, 1971 / 
sponsored by Irrigation adn Drainage Divison, American Society of Civil Engineers ; co-sponsor Soil and Water Division, American Society of Agricultural Engineers 
 - 626 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drenaje--Congresos<br/>Riego--Congresos
<br/><br/><label>LC Class. No.: </label>TC803  / I77