00294nam a2200109Ia 4500008004100000082001400041100002200055245003500077260004700112300001000159650001500169140113s9999 xx 000 0 und d a631.67 L8 a" Michael, A. M." aIrrigation theory and practice b"Ghaziabad : Vikas publishing house, 1978" a801p. aIrrigation