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Use of green-manure amendents and tillage to improve minesoil productivity Timothy Opeka , Ronald Morse

By: Opeka, Timothy.
Contributor(s): Morse, Ronald [jt. aut].
Material type: TextTextPublisher: Washington : United States Government Printing Office, 1979Description: 85 ; 28 cm.Subject(s): Mining engineering | Mining machineryDDC classification: 622
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