Nature at work :  introducing ecology / 
British Museum (Natural History). 
 - [London]:   [London]  The Museum,   Cambridge University Press  [1978], [1982].  
 - 84 p. :  ill. ;  22 cm. 
<br/><br/>Includes index and bibliography. 
<br/><br/><label>ISBN: </label>052129469X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Nature
<br/><br/><label>Dewey Class. No.: </label>577