Walker, W. R. <br/><br/>
Guidelines for designing and evaluating surface irrigation systems / 
by W.R. Walker. 
 - Rome :  Food and Agriculture Organization of the United Nations,  1989. 
 - xi, 137 p. 
 - FAO irrigation and drainage paper ; .
<br/><br/><label>ISBN: </label>9251028796 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrigation engineering.<br/>Irrigation--Evaluation.