Order by Best Match A - Z Z - A Oldest Newest Go 1 publication found Series: Field Trip Guide Book Authors: Heyl, A.V. Counties: Lafayette Filter Results Upper Mississippi Valley Base-Metal District Companion volume to Information Circular 16 (third edition). Prepared for 24th Annual Meeting, Institute on Lake Superior Geology. FTGB01 Upper Mississippi Valley Base-Metal District Broughton, W.A.; Heyl, A.V.; Mudrey, M.G., Jr.; Ostrom, M.E.; Paull, R.K.; Paull, R.A.; West, W.S.; 1978 Report: 39 p.
