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https://www.epo.org/de/boards-of-appeal/decisions/t900869eu2 T 0869/90 (Electromagnetic borehole logging / TEXACO) vom 01.07.1992 borehole logging electromagnetic texaco vom https://portal.research.lu.se/en/publications/borehole-logging-and-slug-tests-for-evaluating-the-applicability-/ Borehole logging and slug tests for evaluating the applicability of electrical resistivity... borehole logging slug tests evaluating applicability https://www.usgs.gov/media/images/borehole-logging Borehole logging | U.S. Geological Survey borehole logging u s geological survey