Proceedings of the International Workshop on Rock Mass Classification in Underground Mining [electronic resource] / edited by Christopher Mark, Rimas Pakalnis, and Robert J. Tuchman.
Imprint
[Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, [2007]
Mode of access: Internet from the CDC web site. Address as of 03/25/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/2007-128.pdf; current access available via PURL.
Note
Title from tltle screen (viewed on Mar. 25, 2008).
