Tolong jelaskan mengenai Artikel dari Nicholas J. Spykman

The Social Background of Asiatic Nationalism, The American Journal of Sociology 1926, issue 3

International Relations from the Point of View of Teaching, in: Proceedings of the Fourth Conference of Teachers of International Law and Related Subjects, Washington 1930

Methods of Approach to the Study of International Relations, in: Proceedings of the Fifth Conference of Teachers of International Law and Related Subjects, Washington 1933

States’ Rights and the League, The Yale Review 1934, issue 2

Geography and Foreign Policy, I, The American Political Science Review 1938, issue 1

Geography and Foreign Policy, II, The American Political Science Review 1938, issue 2

with A. A. Rollins, Geographic Objectives in Foreign Policy, I, The American Political Science Review 1939, issue 3

with A. A. Rollins, Geographic Objectives in Foreign Policy, II, The American Political Science Review 1939, issue 4

Frontiers, Security, and International Organization, Geographical Review 1942, issue 3