found: Physical properties data for rock salt, 1981 (a.e.)t.p. (J. Lorenz, National Center for the Thermodynamic Data of Minerals, U.S. Department of the Interior, Geological Survey, Reston, Va.)
found: Phone call 3/26/81 to the Center(John Lorenz, now a graduate student at Princeton)
found: Tel. call to Princeton Univ., Dept. of Geology, 6/19/81(John Clay Lorenz; b. 5/18/50; Ph. D., Princeton Univ., 1981)
found: Atlas of natural and induced fractures in core, 2017:ECIP t.p. (John C. Lorenz, Fracture Studies LLC, New Mexico)
found: Fracture Studies [company site], viewed Sept. 7, 2017(John Lorenz and Scott Cooper est'd the company; John C. Lorenz, B.A., 1972, geology and anthropology, Oberlin College, Oberlin, Ohio; M. Sc., 1975, geology, University of South Carolina; Ph. D., 1981, geology, Princeton University)