-<term><name>Apple computer</name><frequency>40</frequency></term>
-<term><name>BASIC (Computer program language)</name><frequency>38</frequency></term>
-<term><name>Atari computer</name><frequency>35</frequency></term>
-<term><name>Programming (Computers)</name><frequency>30</frequency></term>
-<term><name>Digital computer simulation</name><frequency>20</frequency></term>
-<term><name>Computer graphics</name><frequency>18</frequency></term>
-<term><name>LOGO (Computer program language)</name><frequency>14</frequency></term>
-<term><name>Computer games</name><frequency>14</frequency></term>
-<term><name>Debugging in computer science</name><frequency>8</frequency></term>
-<term><name>Time-sharing computer systems</name><frequency>8</frequency></term>
-<term><name>Virtual computer systems</name><frequency>8</frequency></term>
-<term><name>Interactive computer systems</name><frequency>8</frequency></term>
-<term><name>Embedded computer systems</name><frequency>7</frequency></term>
-<term><name>Computers</name><frequency>6</frequency></term>
-<term><name>Engineering</name><frequency>6</frequency></term>
+<term><name>Water-supply</name><frequency>43</frequency></term>
+<term><name>Water</name><frequency>33</frequency></term>
+<term><name>Water resources development</name><frequency>23</frequency></term>
+<term><name>Water quality</name><frequency>13</frequency></term>
+<term><name>Water quality management</name><frequency>10</frequency></term>
+<term><name>Water conservation</name><frequency>9</frequency></term>
+<term><name>Drinking water</name><frequency>6</frequency></term>
+<term><name>Groundwater</name><frequency>6</frequency></term>
+<term><name>Water rights</name><frequency>6</frequency></term>
+<term><name>Water use</name><frequency>6</frequency></term>
+<term><name>Aquifers</name><frequency>3</frequency></term>
+<term><name>Hydrology</name><frequency>3</frequency></term>
+<term><name>Purification of</name><frequency>3</frequency></term>
+<term><name>Water harvesting</name><frequency>3</frequency></term>
+<term><name>Water supply</name><frequency>3</frequency></term>
+</list>
+<list name="author">
+<term><name>Baker, M. N</name><frequency>2</frequency></term>
+<term><name>Ambrose, David</name><frequency>1</frequency></term>
+<term><name>Austin, George Lowell</name><frequency>1</frequency></term>
+<term><name>Base, Graeme</name><frequency>1</frequency></term>
+<term><name>Bauer, Steve</name><frequency>1</frequency></term>
+<term><name>Bryan, Michelle</name><frequency>1</frequency></term>
+<term><name>Das, Keshab</name><frequency>1</frequency></term>
+<term><name>Davis, Floyd</name><frequency>1</frequency></term>
+<term><name>De Villiers, Marq</name><frequency>1</frequency></term>
+<term><name>Dinesh Kumar, M</name><frequency>1</frequency></term>
+<term><name>Donald, Rhonda Lucas</name><frequency>1</frequency></term>
+<term><name>Ellet, Charles</name><frequency>1</frequency></term>
+<term><name>Faeth, Paul</name><frequency>1</frequency></term>
+<term><name>Farnham, Henry P</name><frequency>1</frequency></term>
+<term><name>Fisher, D. E</name><frequency>1</frequency></term>