GREGORY, S. (1968). Statirical methods and the geographer. Longmans.
Tohutoru Kātū Chicago (17th ed.)GREGORY, Stanley. Statirical Methods and the Geographer. London: Longmans, 1968.
Tohutoro MLA (9th ed.)GREGORY, Stanley. Statirical Methods and the Geographer. Longmans, 1968.
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