Scott, Douglas F. MPH; Grayson, R Larry PhD; Metz, Edward A. MD
From National Institute for Occupational Safety and Health, Spokane Research Laboratory, Mining Injury and Disease Prevention Branch, Spokane, Washington; University of Missouri-Rolla, MO, Mining Engineering Department, Rolla, Missouri; and Gilmore, Metz & Associates, Crawford, Nebraska.
Address correspondence to: Douglas F. Scott, National Institute for Occupational Safety and Health, Spokane Research Laboratory, Mining Injury and Disease Prevention Branch, 315 E. Montgomery Ave., Spokane, WA 99207. E-mail address: [email protected].
This article was co-written by an officer or employee of the US Government as part of his official duties and is therefore not subject to US copyright.