“…For example, Switzer (1981Switzer ( , 1986Switzer ( , 1989) was one of the earliest statistical researchers to jointly consider temporal and spatial variations in modeling air pollution data. In addition, Bilonick (1983) and Guertin and Villeneuve (1989) discuss statistical models for data related to acid precipitation. In addition, Bilonick (1983) and Guertin and Villeneuve (1989) discuss statistical models for data related to acid precipitation.…”