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Period 20th century
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Remove constraint Image Available: UnavailableSubject Terms Conservation of natural resources.
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- Date:
- c1995
- Physical Description:
- xvi, 96 p. : ill. (some col.) ; 31 cm.
- Collection:
- Reference Library
- Date:
- c1993
- Physical Description:
- 96 p. : ill. (some col.) ; 31 cm.
- Collection:
- Reference Library