Norcliffe, G. B. (1977). Inferential statistics for geographers. Hutchinson.
Lua i Stíl Chicago (17ú heag.)Norcliffe, G. B. Inferential Statistics for Geographers. London: Hutchinson, 1977.
Lua MLA (9ú heag.)Norcliffe, G. B. Inferential Statistics for Geographers. Hutchinson, 1977.
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