Walker, H. M. (1951). Mathematics essential for elementary statistics: A self teaching manual. Oxford & IBH publishing.
シカゴスタイル引用形Walker, Helen M. Mathematics Essential for Elementary Statistics: A Self Teaching Manual. Calcutta: Oxford & IBH publishing, 1951.
MLA引用形式Walker, Helen M. Mathematics Essential for Elementary Statistics: A Self Teaching Manual. Oxford & IBH publishing, 1951.
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