International Journal of Mining Science and Technology
International Journal of Mining Science and Technology > 2013 > 23 > 4 > 481-487
International Journal of Mining Science and Technology > 2013 > 23 > 4 > 513-519
International Journal of Mining Science and Technology > 2013 > 23 > 4 > 481-487
International Journal of Mining Science and Technology > 2013 > 23 > 4 > 513-519