Great Lakes transportation in the eighties /
Ronald L. Heilmann, Harold M. Mayer, Eric Schenker, with the collaboration of Patricia F. Rieselbach.
- Madison, WI : University of Wisconsin Sea Grant Institute, c1986.
- 100 p. : ill. ; 26 cm.
- Sea grant technical report ; no. WIS-SG-85-242 .
- Sea grant technical report (University of Wisconsin Sea Grant Institute) ; no. WIS-SG-85-242. .