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Robert Finkelman
The U.S. Geological Survey (USGS) conducted the National Coal Quality Inventory (NaCQI) between 1999 and 2005 to address a need for quality information on coals that will be mined during the next 20-30 years. Collaboration between the USGS, State geo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae2ccc3490032f5a099e93fe00dd37ae
https://doi.org/10.2172/891305
https://doi.org/10.2172/891305