TY - RPRT TI - Genetic implications of regional and temporal trends in ore fluid geochemistry of Mississippi Valley-type deposits in the Ozark region AU - J.G. Viets AU - D. L. Leach PY - 1990 DO - 10.2113/gsecongeo.85.4.842 UR - https://pubs.usgs.gov/publication/70015732 ID - 70015732 ER -