a BBC Studios Natural History Unit production ; a co-production with BBC America, Tencent, WDR, France Televisions and CCTV9 ; a BBC Open University partnership ; executive producer, James Honeyborne ; series producer, Mark Brownlow ; producers, Miles Barton, Orla Doherty, Kathryn Jeffs, Will Ridgeon, John Ruthven, Jonathan Smith
by William F. James ... [and others] ; prepared for State of Wisconsin, Dept. of Natural Resources, U.S. Army Engineer District, St. Paul and U.S. Army Corps of Engineers
Date
[1995]
Series
Technical report (U.S. Army Engineer Waterways Experiment Station) ; W-95-2