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2. Assel, R. A. 1983b. A computerized data base of ice concentration for the Great Lakes. NOAA DR ERL GLERL-317, National Technical Information Service, Springfield, VA 22161.
3. Assel, R. A. 1985. Lake Superior cooling season temperture climatology. NOAA TM ERL GLERL-58. Great Lakes Environmental Research Laboratory, 2300 Washtenaw, Ann Arbor, MI 48104.
4. Assel, R. A, Quinn, F. H., Leshkevich, G. A., and Bolsenga, S. J. 1983. NOAA Great Lakes ice atlas. PB84160811, National Technical Information Service, Springfield, VA 22161.
5. Characteristics of the thermal regime of Lake Superior;Bennett;J. Great Lakes Res.,1978