Microbial process for producing methane from coal von MENGER, WILLIAM M, KERN, ERNEST E, GRETHLEIN, HANS E, KARKALITS, O. C, LEUSCHNER, ALFRED P, ODELSON, DAVID, WISE, DONALD L

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A practical village biogas system for wastes and agricultural residues von Wise, Donald L., Leuschner, Alfred P., Levy, Peter F., Sharaf, Mostafa A.

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Low-capital-cost fuel-gas production from combined organic residues — the global potential von Wise, Donald L., Leuschner, Alfred P., Levy, Peter F., Sharaf, Mostafa A., Wentworth, Ralph L.

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Biochemically reacting substrates in subterranean cavities von MENGER, WILLIAM M, KERN, ERNEST E, KARKALITS, O. C, LEUSCHNER, ALFRED P, WISE, DONALD L, ALLEN, KERMIT

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