00273nam a2200097Ia 4500008004100000082001600041100001800057245005100075260003400126650001500160220204s9999    xx            000 0 und d  a631.67bNIR  aNIRANJAN PANT 0aProductivity and equity in irrigation systems.  aDelhibAshish Pub Housec1984  aIrrigation