David R.  Hill
   Mathematics Department 
Temple University 
Philadelphia, PA  19122
Voice: 215-204-1654   

Fax:  215-204-6433 
Email:  hill@math.temple.edu
Lila F. Roberts
Mathematics and CS Department 
Georgia Southern University
Statesboro, GA  30460-8093
Voice:  912-681-0368 

Fax:  912-681-0654 
Email:  somatlr@gsvms2.cc.gasou.edu