Die Afrikaanse Protestantse Akademie NPC

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Practical research : planning and design / by Leedy, Paul D. Publication: New York : Macmillan, 1980 . ix, 270 p. : , Includes index. 28 cm. Date: 1980 Availability: No items available:
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Survey research methods / by Babbie, Earl R. Publication: Belmont, Calif. : Wadsworth Pub. Co., 1990 . xx, 395 pages ; 24 cm Date: 1990 Availability: Items available: Die Afrikaanse Protestantse Akademie (1),
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Experimental and quasi-experimental designs for research / by Campbell, Donald T. Publication: . ix, 84 pages : , "Originally appeared in N.L. Gage (editor), Handbook of research on teaching." 24 cm Availability: Items available: Die Afrikaanse Protestantse Akademie (1),
Die Afrikaanse Protestantse Akademie Die Afrikaanse Protestantse Akademie NPC