1. Abel, J.F., Jr and Hoskins, W.N. (1976) Confined core pillar design for Colorado oil shale,Proceedings of the Ninth Symposium on Oil Shale, Vol. 71, no. 4, Colorado School of Mines, pp. 287?308.
2. Alves, C.A. (1977)Rock Mechanics Instrumentation Applied to Longwall Coal Mining, MS thesis, Colorado School of Mines, 224 pp.
3. ASTM (1971)Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens, American National Standard ANSI/ASTM D 2938-71a, 2 pp.
4. ASTM (1974)Standard Test Method for Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements, Designation D 2664-67 (Reapproved 1974), 4 pp.
5. Beall, G.K. (1979)Trip Report, Duval Potash's Nash Draw Mine, National Potash Co.'s Potash Mine, WIPP Core Storage Facility and the WIPP Site, Dravo Corporation, 16 pp.