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HE organization of the surface of the earth into spatial units having stated levels of difference in specific characteristics is the aim of regional geography. From a methodological viewpoint the procedures employed in regionalization by geographers and sociologists fall into two categories: 1. Observational-descriptive 2. Observational-relational According to the first approach, which is purely empirical, physical or socioeconomic data are collected by means of field traverses or assembled from census units. Boundaries are established to separate regions where noticeable changes occur. The raw data may be manipulated statistically to develop simple or multiple indices. The regions are then described in terms of the same values used to delimit them. Using this method geographers have delimitedagricultural, manufacturing, and ethnic regions.' In general, the regional studies of sociologists have included several socioeconomic factors derived from county census data which were statistically treated to construct indices. In addition to the construction of simple and multiple indices, factor analysis involving latitude and longitude and correlation analysis techniques were also used.2 In the second method, which combines em