Zipper, C.E. 1990. Variances from "approximate original contour" requirements in central Appalachia: History and prospects. p. 153 - 157, In: Proceedings, 1990 Mining and Reclamation Conference and Exhibition. Charleston, West Virginia. National meeting of the American Society for Surface Mining and Reclamation.

Zipper, C.E., and W.L. Daniels. 1989. Hollow fill construction at the Amos Ridge experimental practice. In: Proceedings, National Meeting of the American Society for Surface Mining and Reclamation. Calgary, Alberta, Canada.

Zipper, C.E., W.L. Daniels and J.C. Bell. 1989. An experimental alternative to "approximate original contour" in steep slope terrain: environmental and policy implications. Journal of Soil and Water Conservation. 44(4):279-283.

Zipper, C.E., W.L. Daniels, and J.C. Bell. 1989. The practice of "approximate original contour" in the Central Appalachians. II. Economic and environmental implications of an alternative. Landscape and Urban Planning. 18:139-152.

Zipper, C.E. 1988. Amos Ridge Experimental Practice - Final Monitoring Report. Prepared for U.S. Office of Surface Mining Reclamation and Enforcement to fulfill requirements of Experimental Practice Monitoring Contract EC68-PO8-12867.

Zipper, Carl E., and W.L. Daniels. 1988. Institutional constraints to production of reclaimed mine lands suitable for development in central Appalachia. pp. 319-325. In: Mine Drainage and Surface Mine Reclamation, Volume II. U.S. Bureau of Mines Information Circular 9184. Proceedings, National Meeting of the American Society for Surface Mining and Reclamation.

Zipper, C. E. 1987. An Economic Analysis of Beef Cow-Calf Operations and Eastern White Pine Timber Plantations on Surface Mined Lands in Southwest Virginia. M.S. Research Paper, Agricultural Economics.

Zipper, C. E. 1987. Mined Land Reclamation and Development Potentials in Southwestern Virginia's Coal-Mining Region. In: Land: Issues and Problems. Virginia Cooperative Extension Service. No. 69.

Daniels, W. L., and C. E. Zipper. 1986. Improving coal surface mine reclamation in the central Appalachian Region. p. 139-162. In: John Cairns (ed), Rehabilitating Damaged Ecosystems. CRC Press, Boca Raton, FL.

Smith, M., Z. Lou, and E. Topuz. 1986. A Micro-computer simulator for mountain-top removal mine planning and design. In: Proceedings of 3^rd Conference on the Use of Computers in the Coal Industry, Morgantown, WV.

Zipper, C. E. 1986. Opportunities for Improved Surface Mine Reclamation in the Central Appalachian Coal Region. Ph.D. Dissertation, Agronomy.

Zipper, C. E., and W. L. Daniels. 1986. COSTSUM: A system for analysis of operational cost data from coal surface mines. Agric. Res. Digest, No. 14. Va. Agric. Exp. Sta., Blacksburg, Va. p. 8.

Zipper, C. E., and W. L. Daniels. 1986. COSTSUM: A Users Guide. Bull. 86-1, Va. Agric. Exp. Sta., Blacksburg, Va. p. 130.

Chakraborty, A. 1985. An Integrated Computer Simulator for Surface Mining Planning and Design. M.S. Thesis, Mining and Minerals Engineering.

Zipper, C. E., A. Chakraborty, E. Topuz and W. L. Daniels. 1985. A surface mining simulator for application in steep slope topography. In: Proceedings of Symposium on Surface Mining, Hydrology, Sedimentology and Reclamation, Lexington, KY.

Zipper, C. E., A. T. Hall, and W. L. Daniels. 1985. Costs of spoil handling and reclamation at a contour surface mine in steep slope topography. In: Proc. 1985 Symposium on Surface Mining Hydrology, Sedimentology and Reclamation. p. 193-199.

Zipper, C. E., and W. L. Daniels. 1984. Economic monitoring of a contour surface mine in steep slope Appalachian topography. p. 97-102, In: Proceedings, 1984 Symposium on Surface Mining, Hydrology, Sedimentology, and Reclamation.