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How to design and evaluate research in education / Jack R. Fraenkel, Norman E. Wallen, Helen H. Hyun  New York : McGraw-Hill Education, [2015]  ©2015 . xxviii, 640 stran, A-16, G-9, C-1, I-10 . ISBN 978-1-259-25392-8 (brožováno) .   [1, currently available 0]