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1.
Educational research : competencies for analysis and applications / by Gay, L. R. Publication: Upper Saddle River, N.J. : Merrill/Prentice Hall, 2003 . xvii, 605 p. : 27 cm. Date: 2003 Availability: Items available: Rongo University Library (2),

2.
Educational research : competencies for analysis & application / by Gay, L. R. Publication: Columbus : Merrill, 1981 . xviii, 446 p., [1] leaf of plates : 26 cm. Date: 1981 Availability: Items available: Rongo University Library (1),

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