Evaluation of conceptual models of natural organic matter (humus) from a consideration of the chemical and biochemical processes of humification / by Robert L. Wershaw.
R. L Wershaw ; Geological Survey (U.S.)
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Information Services distributor 2004
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