How to design and evaluate research in education
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F 799 Fraenkel,J. R. | |
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How to design and evaluate research in education
J. R. Fraenkel, N. E. Wallen — 5th ed. — Boston, MA; McGraw-Hill 2003 — 623p.+ 1o=эл. опт. диск (CD-ROM) 0072485604 |