

Illinois State Geological Survey radiocarbon dates IV.
Abstract
Wood, silt, Illinois, Lake Michigan, Ontario, New Mexico; for reference to part 3, see this Bibliography Vol. 36, No. 6, 06 E72-19205.
Keywords
government agencies;Illinois;silt;survey organizations;Illinois State Geological Survey;United States;sediments;wood;clastic sediments;C 14;carbon;dates;isotopes;radioactive isotopes;absolute age