Smith, D. M. (1975). Patterns in human geography: An introduction to numerical methods. David & Charles.
Chicago-referens (17:e uppl.)Smith, David Marshall. Patterns in Human Geography: An Introduction to Numerical Methods. Newton Abbot [Eng.]: David & Charles, 1975.
MLA-referens (9:e uppl.)Smith, David Marshall. Patterns in Human Geography: An Introduction to Numerical Methods. David & Charles, 1975.
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