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1

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Micromorphological analysis of soil : lower levels in the organization of organic soil materials. L.Bal.

by Bal, L.
Published 1973

2

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Humic substances in terrestrial ecosystems edited by Alessandro Piccolo..

Published 1996

3

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Biophysico-chemical processes involving natural nonliving organic matter in environmental systems edited by Nicola Senesi, Baoshan Xing, Pan Ming Huang.

Published 2009

4

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Soil organic matter in sustainable agriculture Frederick R. Magdoff.

Published 2004

5

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Humic substances : molecular details and applications in land and water conservation edited by Elham A. Ghabbour, Geoffrey Davies.

Published 2005