Title: Great Lakes ice atlas
Description: A series of 33 charts illustrating the ice cover on the Great Lakes of North America for three classifications of winter: mild, normal and severe. Examines 20 years of temperature records for each lake, with six ice charts for each of the five great lakes (Erie, Huron, Ontario, Michigan and Superior) and threee charts for Lake St. Clair.
Subjects: Ice on rivers, lakes
Places: Great Lakes (North America)