Method for predicting methane emissions on extended longwall faces [electronic resource].
Imprint
[Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, [1997]
Mode of access: Internet from the CDC web site. Address as of 03/07/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/tn465.pdf; current access available via PURL.