Distances between cities acting as national midpoints in the European system 1816-1980
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资源简介：
<p>Measurement of distances between European states in the period 1816-1980. These distances were used as system parameters for a model of European power relations during this period. The distances were obtained by applying trigonometric calculation to the spherical coordinates of cities acting as national midpoints.</p>
创建时间：
1984-12-15
