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Countries Visited |
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Stolberg Engineer Beratung GmbH (Consulting Company) Germany . |
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Higher Institute of Mining and Geology, Sofia, Bulgaria in connection with the bacterial leaching project. |
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Department of Metallurgy, National Technical University of Athens, Greece regarding bacterial leaching project. |
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Institute of Environmental Engineering, Polish Academy of Science, Poland , under the joint programme on microbial desulphurization of coal and bacterial leaching of low grade ore. |
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