Humus Substances and the Environment

Humus Substances and the Environment


Journal of Ecological Science “Еcology and Future”, 2, 3-4. 2003. BHSS – conference’03 Second National conference with International Participation, 17-19 September, Borovetz, Bulgaria

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Coal Autooxidation

Coal Autooxidation


Author: Markova K. Year: 2002 SciBulCom LTD, Sofia, 277 p

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