Hirsh, S. A., & Wiggins, K. T. (1989). World geography today. Holt, Rinehart and Winston.
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Chicago-čujuhus (17. p.)
Hirsh, Stephanie A., juo Karen Tindel Wiggins. World Geography Today. Austin, Tex.: Holt, Rinehart and Winston, 1989.
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MLA-čujuhus (9. p.)
Hirsh, Stephanie A., juo Karen Tindel Wiggins. World Geography Today. Holt, Rinehart and Winston, 1989.
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