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I 19. 4/ 2 : 987 : The use of surface geophysical techniques to detect fractures in bedrock : an annotated bibliography / by Mark R. Lewis and F.P. Haeni ; prepared in cooperation with U.S. Department of Energy.
I 19. 4/ 2 : 1035 : USGS research on mineral resources--1989 : program and abstracts / edited by Katharine S. Schindler ; Fifth Annual V.E. McKelvey Forum on Mineral and Energy Resources.
I 19. 4/ 2 : 1036 : Safe disposal of radionuclides in low-level radioactive waste repository sites : Low-Level Radioactive Waste, Disposal Workshop, U.S. Geological Survey, July 11-16, 1987, Big Bear Lake, Calif. : proceedings / edited by Marion S. Bedinger and Peter R. Stevens.
I 19. 4/ 2 : 1037 : Metalliferous black shales and related ore deposits : program and abstracts : 1988 meeting of the United States Working Group of International Geological Correlation Program Project 254 / edited by Richard I. Grauch and Joel S. Leventhal.
I 19. 4/ 2 : 1038 : Geohazards '88 : a symposium highlighting research on the causes, effects, and prediction of geologic and hydrologic hazards : program abstracts / Carroll Ann Hodges, editor.