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| 1. |
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The California Nitrogen Assessment
Thomas P Tomich, Sonja B Brodt, Randy A Dahlgren, Kate M Scow
Häftad. University of California Press, USA, 2016.
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| 2. |
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California Nitrogen Assessment
Thomas P Tomich
E-bok. University of California Press, USA, 2016.
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| 3. |
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Transforming Agrarian Economies
Thomas P Tomich, Peter Kilby, Bruce F Johnston
Häftad. Cornell University Press, USA, 1995.
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