Conference in the Matter of Progress Meeting of the Conference Concerning Pollution of the Interstate and Intrastate Waters of the Upper Mississippi River and Its Tributaries - Minnesota and Wisconsin (2nd : 1969 : Minneapolis, Minn.)
prepared by the Office of Crystalline Repository Development, Battelle Project Management Division under Contract no. DE-AC02-83CH10139 with the U.S. Department of Energy
Progress Evaluation Meeting in the Matter of Pollution of the Interstate and Intrastate Waters of the Upper Mississippi River and Its Tributaries: Minnesota and Wisconsin (1968 : Minneapolis, Minn.)