11th U.S./North American Mine Ventilation Symposium 2006 [Elektronisk resurs] proceedings of the 11th U.S./North American Mine Ventilation Symposium : the Pennsylvania State University, University Park, Pennsylvania, USA : 5-7 June 2006 / editors, Jan M. Mutmansky, Raja V. Ramani.
U.S./North American Mine Ventilation Symposium(11th : 2006 : Pennsylvania)