Thomas K. Park
Amadou K. Thiam
Gary L. Christopherson
Gary Christopherson is director of the Center
for Applied Spatial Analysis (CASA) at The University of Arizona.
CASA is a research unit specializing in geographic information systems
(GIS) technologies in the College of Social and Behavioral Sciences.
Correspondence may be sent to: CASA, Harvill 460, The University of
Arizona, Tucson, AZ, 85721, phone (520) 621-6267, or by email.