Problems connected with political boundaries have frequently elicited the interest of geographers. In all countries with chronic or acute boundary problems the geographers are drawn into the general discussion, more or less as experts, and in some cases the professional geographer has actually been called upon to assist in the determination and demarcation of boundaries.

Hartshorne (1933) "Geographic and political boundaries in Upper Silesia" in: Annals of the Association of American Geographers. Vol. 23, No. 4 (Dec., 1933), p. 195

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