... Times¹

13 January 2009, A12:2

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... said²

But see Diane Zabel's occasional column at rusq.org for an essay listing what might be the original expression and the many plagerisms of it

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... types³

Jane S. Smith in the review of her book by Janet Maslin in the New York Times, 04 May 2009, C4:2

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... grades⁴

M. W. P. Strandberg, Design of Examinations and Interpretation of Grades, Am. J. of Phys. 26, 555 (1958)

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