Journal of the Irrigation and Drainage Division. Vol. 117 No. 2 (1991). 

 - New York : American Society of Civil Engineers.  [date of publication not identified] 
 - p. 
<br/><br/> It contains of Papers, Discussion for 1991 in Vol. 117 No. 2. 
<br/><br/>TECHNICAL PAPERS : Problems and Potential of Irrigated Agriculture in Sub-Sahara Africa / Mahmood Alam. Backwater Curves in Circular Channels / Willi H. Hager. Ditch Drainage in Layered Soils / H. C. Sharma, H. S. Chauhan, P. N. Kapoor and Sewa Ram. Sensitivity of Furrow Irrigation System Cost and DesignVariables / J. Mohan Reddy and Horacio M. Apolayo. Normal-Depth Calculations in Complex Channel Sections / Edward D. Shirley and Vicente L. Lopes. Interactive Computer-Aided Design of Inverted Siphons / Pravi Shrestha and Johannes J. DeVries. Drainage of Clay Overlying Artesian Aquifer. I: Hydrologic Assessment / M. E. Grismer and I. C. Tod. Drainage of Clay Overlying Artesian Aquifer. II: Technical Analysis / I. C. Tod and M. E. Grismer. Simulation of Wind-Distorted Sprinkler Patterns / Ido Seginer, Dov Nir, and R. D. von Bernuth. DISCUSSION : Roughness Values for Overland Flow in Subcatchments. S. Y. Liong, S. Selvalingam, and D. K. Brady / Y. M. Chiew and S. K. Tan. Closure by authors.