Cite
HARVARD Citation
Unknown (2006) 11th U.S./North American Mine Ventilation Symposium 2006 : proceedings of the 11th U.S./North American Mine Ventilation Symposium : the Pennsylvania State University, University Park, Pennsylvania, USA : 5-7 June 2006. [Online]. London : Taylor & Francis. Available from: http://access.bl.uk/ark:/81055/vdc_100046511093.0x000001