APA (7th ed.) Zitazioa

(1994). Geographic measurement and quantitative analysis / Robert Earickson, John Harlin.

Chicago Style (17th ed.) Zitazioa

Geographic Measurement and Quantitative Analysis / Robert Earickson, John Harlin. 1994.

MLA (9th ed.) Zitazioa

Geographic Measurement and Quantitative Analysis / Robert Earickson, John Harlin. 1994.

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