1. Brunk , Ivan W. Additional evidence of lowering of Lake Michigan-Huron levels 1963
2. Changes in the levels of Lake Michigan and Huron;Brunk;J. Geophys. Res.,1961
3. Brunk , Ivan W. Hydrology of Lakes Erie and Ontario 1964
4. DeCooke , Ben G. The Great Lakes water levels problem Limnos 1 (1) The Great Lakes Foundation Ann Arbor, Michigan 1968
5. Horton , Robert E. C. E. Grunsky Hydrology of the Great Lakes Report of the Engineering Board of Review Chicago, Illinois 1927