Robertson S.B., Grau, III R.H., Dolgos J.G., Mucho T.P. [2004]. A computer software program that estimates air quantity requirements in large-opening stone mines. In: R. Ganguli, S. Bandopadhyay S, (eds.), Mine ventilation: Proc. of the 10th U.S./North American Mine Ventilation Symp., Anchorage, Alaska, May 16-19, 2004. Leiden, Netherlands: Balkema, 363-369.

Roy Grau, a mining engineer with the National Institute for Occupational Safety and Health, (NIOSH), has more than 10 years experience in developing methods to improve the ventilation and air quality of underground stone mines. He can be contacted via phone at 412-386-6562 or via e-mail at rgrau@cdc.gov.

Robert Krog, a mining engineer with the National Institute for Occupational Safety and Health, (NIOSH), has experience in ventilation design, mine layouts, and fan installations. He can be reached at 412-386-6729 or rkrog@cdc.gov.