Beck, Gregor Gilpin,  1964- <br/><br/>
Watersheds :  a practical handbook for healthy water / 
illustrations and original concept by Clive Dobson ; text by Gregor Gilpin Beck. 
 - Willowdale, Ont. :  Firefly Books,  1999. 
 - 152 p. :  ill., maps ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/>What is a watershed? -- How watersheds work : water and nutrient cycles -- From headwaters to outflows : parts of a watershed -- Natural changes within watersheds -- Air pollution -- Water pollution -- The impact of exotic species : hidden invaders -- Habitat loss and degradation -- Ecological restoration : righting environmental wrongs. 
<br/><br/><label>ISBN: </label>1552093301 (pbk.) :  $19.95 9781552093306 (pbk.) 
<br/><br/><label>LCCN: </label>2002319027 
<br/><br/><label>Nat. Bib. No.: </label>GBA3-43022 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>989326616 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Watersheds--North America.<br/>Water quality.<br/>Ecology.<br/>Pollution.<br/>Cuencas hidrográficas--América del Norte.<br/>Calidad del agua.<br/>Ecología.<br/>Restoration ecology--North America.<br/>Bassins hydrographiques--Amâerique du Nord.<br/>Eau--Qualitâe.<br/>âEcologie.<br/>Pollution.<br/>Râehabilitation (âEcologie)--Amâerique du Nord.
<br/><br/><label>LC Class. No.: </label>QH 102  / B393w 1999 
<br/><br/><label>Dewey Class. No.: </label>577.6