At the crossroads : the mineral problems of the United States /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York :
Wiley,
[1986]
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| Subjects: |
| Physical Description: | xxi, 320 pages : illustrations ; 26 cm. |
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| Bibliography: | Includes bibliographies and indexes. |
| ISBN: | 0471839833 : 0471839825 (pbk.) |