GUIDELINES FOR SAMPLE COLLECTING AND ANALYTICAL METHODS USED IN THE U.S. GEOLOGICAL SURVEY FOR DETERMINING CHEMICAL COMPOSITION OF COAL
By Vernon E. Swanson and Claude Huffman, Jr.
U.S. GEOLOGICAL SURVEY CIRCULAR
735
1976
Created by the EERT WWW Staff.
U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/circ/c735/empirical.htm
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Last modified: 15:03:20 Tue 14 Feb 2006
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