Journal of China University of Mining and Technology
Journal of China University of Mining and Technology > 2007 > 17 > 1 > 30-34
Journal of China University of Mining and Technology > 2007 > 17 > 3 > 376-381
Journal of China University of Mining and Technology > 2007 > 17 > 1 > 30-34
Journal of China University of Mining and Technology > 2007 > 17 > 3 > 376-381