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ELECTRICAL EARTH RESISTIVITY SURVEYS NEAR BRINE HOLDING PONDS IN ILLINOIS = ETUDES DE LA RESISTIVITE ELECTRIQUE TERRESTRE A PROXIMITE DE MARAIS SALANTS DANS L'ILLINOISREED PHILIP C; CARTWRIGHT KEROS; OSBY DONALD et al.1981; ENVIRON. GEOL. NOTES; ISSN 0073-5086; USA; DA. 1981-04; NO 95; 30; BIBL. 13 REF.; ILL.Serial Issue