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		No cover image available Stepping un test score conditional variances by Woodruff, David Material type: Text; Format: print ; Literary form: Not fiction Availability: No items available.
		No cover image available Thin versus thick matching in the mantel-haenszel procedure for detecting DIF* by Donoghue, John R Allen, Nancy L Material type: Text; Format: print ; Literary form: Not fiction Availability: No items available.

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