390231 Thomas, R. W., & Huggett, R. J. (1980). Modelling in geography: A mathematical approach. London : Harper & Row Pub.
Lua i Stíl Chicago (17ú heag.)390231 Thomas, R. W., agus Richard J. Huggett. Modelling in Geography: A Mathematical Approach. London : Harper & Row Pub, 1980.
Lua MLA (9ú heag.)390231 Thomas, R. W., agus Richard J. Huggett. Modelling in Geography: A Mathematical Approach. London : Harper & Row Pub, 1980.
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