2002

Conrad, P. W., R. J. Sweigard, D. H. Graves, J. M. Ringe, and M. H. Pelkki, “Impacts of Spoil Conditions on Reforestation of Surface Mined Land”, Mining Engineering, Vol. 54, No. 10, 2002, pp. 39-46. 

Conrad, P. W., R. J. Sweigard, J. C. Yingling, D. H. Graves, and J. M. Ringe, “Use of Ripping to Alleviate Excessive Compaction on Reclaimed Surface Mined Land”, Transactions 2002, Vol. 312, Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO, 2002, pp. 159-165. 

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