| Item Description: | A World Watch Institute book. |
|---|---|
| Physical Description: | ix, 116 p. : ill. ; 22 cm. |
| Bibliography: | Includes bibliographical references and index. |
| ISBN: | 0393013340 |
| Item Description: | A World Watch Institute book. |
|---|---|
| Physical Description: | ix, 116 p. : ill. ; 22 cm. |
| Bibliography: | Includes bibliographical references and index. |
| ISBN: | 0393013340 |