Sears, F. W. (1964). Quantitative Geography: Techniques and Theories in Geography. Addison-Wesley.
Chicago-referens (17:e uppl.)Sears, Francis Weston. Quantitative Geography: Techniques and Theories in Geography. USA: Addison-Wesley, 1964.
MLA-referens (9:e uppl.)Sears, Francis Weston. Quantitative Geography: Techniques and Theories in Geography. Addison-Wesley, 1964.
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