Isard, W. (1975). Introduction to regional science. Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Isard, Walter. Introduction to Regional Science. .Englewood Cliffs, N.J: Prentice-Hall, 1975.
Tohutoro MLA (9th ed.)Isard, Walter. Introduction to Regional Science. Prentice-Hall, 1975.
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