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A New Generation of Power
Levins, Richard A. - In: Choices 15 (2000) 2
Persistent link: https://www.econbiz.de/10010917287
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A Foray Into A Strange World: But does the exercise answer the central question?
Levins, Richard A. - In: Choices 17 (2002) 2
Persistent link: https://www.econbiz.de/10010917621
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Green Programs: A Corn Belt example of one way to reduce nitrogen use
Levins, Richard A.; Schmitt, Michael A. - In: Choices 10 (1995) 2
Persistent link: https://www.econbiz.de/10010917624