Methane emission rate study in a deep Pocahontas No. 3 coalbed mine in conjunction with drilling degasification holes in the coalbed [electronic resource] / by Stephen Krickovic and J.D. Kalasky.
Imprint
[Pittsburgh, Pa.?] : U.S. Dept. of the Interior, Bureau of Mines, [1972]
Mode of access: Internet at the National Institute for Occupational Safety and Health web site. Address as of 7/23/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/ri7703.pdf; current access available via PURL.
Note
Title from title screen (viewed on July 23, 2008).