U.S. Army Engineer Waterways Experiment Station ; [available from National Technical Information Service],
Disk plows and disk harrows : section 8.2.5, US Army Corps of Engineers wildlife resources management manual
Technical report ;
Technical report (U.S. Army Engineer Waterways Experiment Station) ;
Doerr, T. B. (Ted Bachman)
U.S. Army Engineer Waterways Experiment Station.
United States. Army. Corps of Engineers.
Environmental Impact Research Program (U.S.)
by Ted B. Doerr.
Disk plows and disk harrows : section 8.2.5, US Army Corps of Engineers wildlife resources management manual