This was used with classes at George Mason University in 1985. Also it might have been used earlier at University of Virginia. It was one of several "self-paced learning units" which Warfield first wrote for Walter Bogan's contract (Warfield was principal investigator and Walter was his supervisor for a U.S. Dept of Education contract on environmental education beginning about 1978 and ending about 1982.) I can't find this listed in SC&A finding aid nor in any home computer files. Must be missing. Not a very important paper, so maybe we didn't save it. R.w. 25 Aug 2013
