		Better Farming Series 28 - Water: Where Water Comes from (FAO, 1981, 31 p.)
			(introduction...)
			Preface
			Why we study water
			When rain falls
			Water in the ground
			Where to find water in the ground
			Water on the surface
			Where to find surface water

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome 1981

First printing 1981

P-69
ISBN 92-5-101086-2