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These studies comprise part of the data submitted in a Ph. D. thesis to the University of Bristol in 1953.
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Wheeler, B.E.J., Yemm, E.W. The conversion of amino acids in soils. Plant Soil 10, 49–77 (1958). https://doi.org/10.1007/BF01343737
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DOI: https://doi.org/10.1007/BF01343737